WO2015109747A1 - 小小区基站状态切换方法及装置、计算机存储介质 - Google Patents

小小区基站状态切换方法及装置、计算机存储介质 Download PDF

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Publication number
WO2015109747A1
WO2015109747A1 PCT/CN2014/080551 CN2014080551W WO2015109747A1 WO 2015109747 A1 WO2015109747 A1 WO 2015109747A1 CN 2014080551 W CN2014080551 W CN 2014080551W WO 2015109747 A1 WO2015109747 A1 WO 2015109747A1
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Prior art keywords
small cell
base station
cell base
state switching
state
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PCT/CN2014/080551
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English (en)
French (fr)
Inventor
徐汉青
赵亚军
莫林梅
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ZTE Corp
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ZTE Corp
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Priority to US15/113,574 priority Critical patent/US9961714B2/en
Priority to EP14879574.3A priority patent/EP3099099A4/en
Priority to JP2016548154A priority patent/JP6338680B2/ja
Publication of WO2015109747A1 publication Critical patent/WO2015109747A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/32—Hierarchical cell structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] 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
    • 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 small cell base station state switching technology in the field of wireless communications, and in particular, to a small cell base station state switching method and apparatus, and a computer storage medium. Background technique
  • the deployment of dense small cells is an effective mechanism to increase network capacity and reduce coverage holes, but it also causes serious interference problems between small cells and increased energy consumption of small cells. Therefore, in order to reduce the mutual interference between the small cells and the energy consumption of the small cell base station, the small cell base station needs to enter a low power sleep state when appropriate.
  • Several modes have been proposed in the prior art for causing a small cell base station to enter a sleep state and how to activate a small cell in a dormant state, but each mode has its own advantages and disadvantages.
  • the embodiments of the present invention provide a method and device for switching a small cell base station state, and a computer storage medium.
  • An embodiment of the present invention provides a method for switching a state of a small cell base station, where the method includes: Obtaining state switching information including a state switching mode;
  • the embodiment of the present invention further provides a small cell base station state switching device, where the device includes: an acquiring unit, configured to acquire state switching information including a state switching mode;
  • the embodiment of the invention further provides a computer storage medium, wherein a computer program is stored, which is used to execute a small cell base station state switching method.
  • the small cell base station state switching method and device, and the computer storage medium according to the embodiment of the present invention perform state switching according to the acquired state switching information, and switch with respect to the existing small cell base station according to a pre-fixed switching mode.
  • the indication of the status information can flexibly select the state switching mode to minimize the power of the small cell base station while ensuring normal access or cut-out of various terminals to improve user satisfaction.
  • FIG. 1 is a schematic flowchart of a small cell base station state handover method according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flowchart of a small cell base station sleep method according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a small cell base station state switching structure according to Embodiment 2 of the present invention
  • FIG. 5 is a flowchart of an application example of a small cell state switching method according to the present invention. detailed description
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • this embodiment provides a method for switching a state of a small cell base station, where the method includes: Step S110: Acquire state switching information including a state switching mode.
  • Step S120 Perform small cell base station state switching according to the state switching information.
  • the state switching of the small cell base station includes the small cell base station entering the sleep state from the active state and the active state from the sleep state.
  • a small base station or a small base station or a home base station usually covers a small cell formed; in the physical range in which the small cell is located, there may be coverage of a macro base station, other small base stations, small base stations, or home base stations.
  • a number of small cell base stations are grouped together to form a cluster, and the management network element of the cluster is usually called a cluster head.
  • the cluster head may correspond to a single physical network element, or may be a logical network element divided by the existing network management device.
  • the specific method for acquiring the sleep mode or the sleep configuration includes at least three types:
  • the first type the small cell base station that needs to enter dormancy selects the state switching mode according to the current terminal access situation, the terminal type, the performance of the small cell base station itself, the compatibility, and the interference coverage of the small cell itself and its neighboring cells. Generate state switching information. Specifically, according to the random access signal of the terminal or according to the feedback of the first signal, the current terminal access amount, data traffic, terminal type and the like in the small cell are determined. The performance, compatibility, and other parameters of the small cell base station itself can be extracted by the small cell base station or set by the administrator. The interference coverage of the small cell neighboring area can be obtained by receiving information sent by the management device or the small cell neighboring cell base station and the like, and there are various methods for implementation, which are not described herein.
  • the second type the small cell base station receives the state switching information from the base station of the small cell neighboring area, the macro base station of the macro cell covering the small cell, or the cluster head of the small cell base station.
  • the macro base station or the cluster head is the upper-level network element of the small cell base station in terms of device performance and logical division, and the small cell base station can be allocated and allocated to reduce the coverage rate in the joint coverage area of the wireless network, Transmit power and achieve a variety of sleep modes for flexible use, while ensuring timely access and cut-out of the terminal to improve user satisfaction.
  • the third type When the small cell base station is a secondary base station that assists other base stations, the state switching information may also be received from a primary base station of the small cell base station.
  • the method for forming the state switching information by the primary base station of the small cell base station may refer to a method for forming state switching information by referring to a base station of the small cell base station itself and/or a macro base station.
  • the first dynamic switching mode the number of times that the small cell base station switches between the dormant and active states, with the switching time being fast in the subframe level. Because the switching time is short, it can be quickly switched from the dormant state to the active state, which ensures that the terminal in the dense network accesses the small cell in hibernation in time, so that the overall efficiency of the network is improved.
  • a legacy terminal which can be considered as a terminal corresponding to a communication protocol before the 3GPP Release-12 communication protocol
  • the second type static switching mode, also known as slow switching mode, usually the switching time is on the order of several hundred milliseconds to several seconds, and is compatible with R11 terminals (R11 terminals are terminals corresponding to the 3GP Release 11 communication protocol) and 1 11
  • R11 terminals are terminals corresponding to the 3GP Release 11 communication protocol
  • 1 11 The cutting of the traditional terminal earlier than the terminal.
  • the traditional terminal may implement handover from a small cell to a target cell by using a secondary cell deactivation secondary cell activation method.
  • the static switching mode cannot enable the terminal that needs to enter the dormant cell to access the small cell that is sleeping in time, which may have a negative impact on the overall throughput of the network.
  • Semi-static sleep mode a mode between dynamic state mode and static state mode, usually switching time is between ten milliseconds and hundreds of milliseconds.
  • the semi-static state mode is worse than the static state mode for the network to improve the network but with respect to the dynamic sleep mode in terms of throughput improvement, but the dynamic state mode can be compatible to some extent with the traditional terminal in the state-switched small cell. Cut out.
  • the state switching mode When the small cell enters a sleep state from an active state, the state switching mode includes The sleep mode indication; the state switch information further includes a sleep configuration corresponding to the sleep mode, and the following steps S110 and S120 are used to provide a small cell base station sleep method.
  • the method for sleeping a small cell base station includes:
  • Step S210 Acquire a sleep mode indication and a sleep configuration corresponding to the sleep mode.
  • Step S220 Select a sleep mode according to the sleep mode indication and go to sleep;
  • Step S230 Send a first signal according to the sleep configuration during sleep;
  • the first signal includes at least one of a discovery signal, a synchronization signal, a channel state information reference signal, and a small cell-specific reference signal.
  • the small cell specific reference signal is a combination of one or more reference signals set according to the type of the small cell and the special requirements.
  • the sleep configuration includes a signal pattern and/or power of the first signal.
  • the signal pattern can include the period and offset of the first signal.
  • the configuration information may further include information such as a transmission frequency, a power, and a radiation angle of each of the first signals.
  • the sleep mode is a dynamic sleep mode, a semi-static sleep mode, or a static sleep mode.
  • the dynamic sleep mode is a dynamic switching mode in which a small cell base station enters a sleep state from an active state;
  • the static sleep mode is a static switching mode in which a small cell base station enters a sleep state from an active state;
  • the semi-static sleep mode is a The semi-static switching mode in which the small cell base station enters the sleep state from the active state.
  • the small cell base station sleep method may further include step S240:
  • Step S240 Acquire an adjusted sleep mode indication and a sleep configuration, and adjust the sleep mode and the first signal; wherein the adjusted sleep mode indication and the sleep configuration may be based on the measurement result fed back by the terminal according to the first signal and/ Or as determined by the preset adjustment strategy.
  • the process returns to step S210 to perform step S210 to step S240 again.
  • the preset adjustment policy is a plurality of small cell base station sleep negotiation policies in the heterogeneous network, and the sleep negotiation policy is that the small cell base station with less terminal camping can enter the sleep according to the current actual throughput and the terminal distribution.
  • the adjusting the first signal comprises adjusting at least one of a type of the first signal, a signal pattern, and power.
  • the small cell base station sleep method further includes:
  • the small cell base station During sleep, the small cell base station further sends a scheduling instruction to the terminal;
  • the small cell base station After the small cell base station sleeps, the measurement of the first signal by the terminal cannot be directly transmitted to the small cell base station, so in order to receive the measurement result of the terminal, to facilitate the adjustment of the sleep mode and the dormant configuration, the small cell base station may also The terminal sends a scheduling instruction, and the terminal can report the measurement result to the small cell base station according to the scheduling instruction.
  • the embodiment provides a small cell base station sleep method, which is compatible with various sleep modes and can timely make decisions based on measurement results and/or network requirements reported by the terminal.
  • the reference factor adjusts the sleep mode to reduce power consumption through hibernation while ensuring sufficient throughput within the network to improve user satisfaction.
  • the state switching mode is an active mode indication; and in combination with step S110 and step S120, a small cell base station activation method is provided.
  • the method for activating a small cell includes:
  • Step S310 Acquire an activation mode indication.
  • Step S320 Select the state switching mode to cause the small cell base station to enter the active state from the sleep state according to the activation mode indication.
  • the activation mode is a state switching mode for causing a small cell base station to enter an active state from a sleep state, including a dynamic activation mode corresponding to a dynamic switching mode (the dynamic activation mode may also be referred to as a dynamic on/off mode), corresponding to a half Semi-static activation mode of static switching mode (the semi-static activation mode can also be called semi-static on/off mode) and static corresponding to static switching mode Active mode (the static activation mode can also be referred to as static on/off mode;).
  • the small cell base station activation method in this embodiment can be compatible and flexibly select multiple activation modes, which can effectively improve throughput, compared to the existing fixed activation method.
  • the state switching information is further sent to the small cell neighboring cell base station and the terminal, and is used for selecting coordination and interference coordination between the small cell and the small cell neighboring cell.
  • information such as an activation mode indication or an activation time in the state switching information is also sent to the terminal to inform the terminal that the small cell base station is about to be activated or has been activated.
  • the terminal can know the time when the small cell base station enters the active state from the dormant state, and avoids that the signal sent by the small cell base station after activation is regarded as noise by the terminal, so as to improve the actual throughput of the system.
  • the small cell base station activation method in this embodiment can flexibly select an activation mode according to requirements, and can maximize the improvement of communication performance such as power reduction, cell throughput, and interference coordination.
  • the state switching information further includes time information of the state switching of the small cell base station, and is used by the terminal to send information to the small cell base station according to the time information.
  • the method further includes:
  • the measurement set includes at least one small cell base station selected and reported by the terminal from the discovered small cell base station according to the measurement reporting policy;
  • the small cell base station that can perform state switching forms a handover set;
  • the selection policy may be a small cell base station corresponding to N measurement results with the highest discovery signal quality according to the measurement result; the N is a positive integer and is smaller than Or equal to the number of small cell base stations in the network.
  • the handover set may include a first handover set and a second handover set; the first handover set includes a plurality of small cell base stations that can enter a sleep state by an activation state; and the second handover set includes a plurality of sleepable states.
  • a small cell base station in an active state. When performing small cell base station state switching, selecting a small cell base station from the handover set, and transmitting State switching information.
  • the set may record a corresponding small cell base station in the form of a table.
  • the base station transmits a discovery signal in both the active state and the sleep state; the transmission frequency of the signal found in the active state is generally higher than the transmission frequency of the signal found in the sleep state. In a special sleep state, the base station may also not send a discovery signal.
  • the terminal will receive the signal sent by the base station in the network. If the discovery signal of a certain base station is received, the base station is found, and the set of base stations covered by the base station discovered by the terminal is usually formed, which is called a discovery set.
  • the terminal discovery is selectively measured and reported from the discovery set to the base station according to the measurement reporting policy (in this embodiment, the small cell base station, the cluster head, the macro base station, the small cell neighbor base station, and/or the primary base station of the small cell base station) ), forming a measurement set.
  • the specific measurement manner may be: performing an SRP/RSRQ (eference Signal Received Power I Reference Signal Received Quality) measurement according to the discovery signal.
  • the measurement reporting policy may be performed by the terminal to measure and report to the base station in the discovery set according to the indication of the network side, or may perform measurement on all the discovery signals in the discovery set, and report to the base station or the network on the network side.
  • the meta entity is for the network side device to choose. There are many kinds of measurement reporting strategies, and they will not be described here.
  • the handover set is also sent to the terminal.
  • the handover set is sent to the terminal, so that the terminal acquires in advance which small cell base stations in the network will perform state switching, so as to prepare for the corresponding handover.
  • the handover information further includes operation indication information, where the operation indication information is used to indicate that the small cell base station independently performs state switching or the primary base station of the macro base station, the cluster head, the small cell neighbor base station, and/or the small cell base station Coordinate with the implementation of state switching.
  • the macro base station, the cluster head, the small cell neighboring base station, and/or the primary base station of the small cell base station specifically coordinate the state switching of each base station in the network by transmitting a state switching parameter or an instruction to the small cell base station.
  • the small cell base station is a secondary base station
  • the small cell base station is based on a primary base.
  • the decision execution state of the station is switched.
  • the embodiment provides a small cell base station state switching method, which can flexibly configure the state and state switching methods of each small cell in the network according to the current wireless network situation and service requirements, so as to reduce network side device energy consumption. At the same time, provide a good communication environment.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment provides a small cell base station state switching device, where the device includes:
  • the acquiring unit 110 is configured to acquire state switching information including a state switching mode.
  • the switching unit 120 is configured to perform small cell base station state switching according to the state switching information.
  • the specific structure of the obtaining unit 110 may include a communication interface, such as a receiving antenna, for receiving the state switching information from a macro base station, a cluster head, a small cell neighboring cell base station, or a primary base station of a small cell base station.
  • the obtaining unit 110 may also be a processor that processes the data by executing a program or software in the storage medium to form the state switching information.
  • the structure of the acquisition unit 110 differs depending on the method of acquiring the state switching information.
  • the specific structure of the switching unit 120 may be a processor for executing a pre-stored program or software to complete state switching of the small cell base station.
  • the processor may be an electronic device having processing functions such as a central processing unit, a single chip microcomputer, a digital signal processor, or a programmable array.
  • the program or software is stored in a storage medium, which is preferably a non-transitory storage medium.
  • the storage medium and the processor can perform data interaction through a bus or a data interface.
  • the device may be a separately set device, or may be a functional unit integrated on the small cell base station or a small cell base station itself.
  • the state switching mode is a sleep mode indication; the state switching information further includes a dormant configuration corresponding to the sleep mode;
  • the switching unit 120 is specifically configured to select a state switching mode according to the sleep mode indication.
  • the device causes the small cell base station to enter the dormant state from the active state; the device further includes a sending unit, wherein the sending unit is configured to send the first signal according to the dormant configuration during the dormant period; wherein the first signal includes the discovery At least one of a signal, a synchronization signal, a channel state information reference signal, and a small cell-specific reference signal; the sleep mode is a dynamic sleep mode, a semi-static sleep mode, or a static sleep mode.
  • the specific structure of the sending unit may be a transmitting antenna.
  • the device further includes an adjusting unit, wherein the adjusting unit is configured to obtain the adjusted sleep mode indication and the dormant configuration, and adjust the sleep mode and the first signal; wherein the adjusted sleep mode indication and the dormant configuration are based on the terminal
  • the measurement result of the first signal feedback and/or the preset adjustment strategy is determined.
  • the sleep configuration includes a signal pattern and/or power of the first signal.
  • the sending unit is further configured to send a scheduling instruction to the terminal during the sleep period
  • the apparatus further includes a receiving unit configured to receive a measurement result of the first signal by the terminal according to the scheduling instruction.
  • the specific structure of the receiving unit may include a communication interface such as a transmitting antenna.
  • the state switching information includes an activation mode indication
  • the switching unit 120 is further configured to select a state switching mode to enable the small cell base station to enter an active state from the dormant state according to the activation mode indication.
  • the activation mode includes a dynamic activation mode, a semi-static activation mode, and a static activation mode.
  • the acquiring unit 110 is specifically configured to receive state switching information sent by a macro base station, a cluster head, and/or a neighboring base station of a small cell, or generate state switching information by itself.
  • the device is further configured to send the state switching information to the small cell neighboring cell base station and the terminal, and use the sleep mode selection coordination and interference coordination between the small cell and the small cell neighboring cell.
  • the device sends the state switching information to the small cell neighboring cell base station and the terminal by using a sending unit.
  • the state switching information further includes time information of the state switching of the small cell base station, and is used by the terminal to send information to the small cell base station according to the time information.
  • the device is further configured to receive, by the receiving antenna, a measurement set reported by the terminal, where the measurement set includes at least one small cell base station selected and reported by the terminal from the discovered small cell base station according to the measurement reporting policy, and Using a processor, selecting, from the measurement set, a small cell base station that can perform state switching according to a selection policy, to form a handover set;
  • the handover set may include a first handover set and a second handover set; the first handover set includes a plurality of small cell base stations that can enter a sleep state by an activation state; and the second handover set includes a plurality of sleepable states. Entering a small cell base station in an active state;
  • the device also transmits the handover set to the terminal after forming the handover set by transmitting a communication interface such as an antenna.
  • the state switching information further includes operation indication information for indicating that the small cell base station performs the state switching independently or in cooperation
  • the switching unit 120 is configured to enable the small cell base station to be independent or coordinated according to the operation indication information. Perform a state switch.
  • the switching unit 120 is configured to: when the operation indication information indicates that the small cell base station independently performs state switching, to enable the small cell base station to perform state switching independently; when the operation indication information indicates the small cell base station When the state switching is performed cooperatively, the small cell base station is cooperatively performed to perform handover according to the decision of the primary base station.
  • the apparatus in this embodiment provides a specific hardware structure for the small cell state switching method according to the first embodiment, and can be used to implement any technical solution of a small cell base station state switching method, and can flexibly select a switching mode.
  • the handover of small cell base stations in the network is implemented.
  • a small cell state switching method includes:
  • Step S101 When a small cell base station needs to sleep, the macro macro base station or the cluster-head cluster head, or the neighboring base station of the small cell to be sleeping, sends the sleep mode indication and the configuration information of the signal sent during the sleep of the small cell base station to the Sleeping to sleep in a small cell base station, and/or its neighbors, and / Or terminal UE.
  • the dormancy indication and configuration information may also be generated by the small cell base station in a specific implementation process.
  • the configuration information may include a signal pattern of a signal sent during sleep of the small cell base station.
  • the signal pattern generally corresponds to information such as the period, offset, radiation angle, and radiation range of the signal transmitted during the sleep of the small cell base station.
  • the configuration information may also include information such as a relative value or an absolute value of the transmitted signal power.
  • Step S102 The sleeping small cell base station performs, for example, sleeping according to the indicated or determined sleep mode in the sleep mode indication, and sends a signal according to the configuration information during the sleep.
  • the signals include discovery signals, CSI-RS (Channel State Information - Reference Signal), and/or other signals for measurement and synchronization.
  • Step S103 The terminal receives the sleep mode indication and configuration information sent by the network side and the signal sent in the step S102, and performs measurement according to the received signal, etc., and reports the measurement result to the cell base station serving the terminal.
  • the serving cell base station of the terminal may be a macro base station Macro, a neighboring cell of the dormant small cell or a sleeping small cell base station itself. If the measurement result of the terminal is received by the macro, the cluster-head, or the dormant small cell base station, and the sleep mode of the sleeping small cell base station needs to be updated based on the measurement result and the type of the UE, the step S101 to this step needs to be re-executed. Operation.
  • Step S104 If the trigger condition is met (the trigger condition may be: a service status change, a terminal is associated with a small cell, and a small cell base station has a data packet arrival, etc.), a Macro or Cluster-head or a dormant small cell base station update parameter configuration And selecting the corresponding activation mode to activate the small cell base station in hibernation; the activation mode can be divided into dynamic on/off mode, semi-static on/off mode, and/or other modes (such as static on/off mode). In the selection, the sleep mode, the performance of the small cell base station corresponding to each sleep mode, and compatibility factors can be comprehensively considered.
  • the trigger condition may be: a service status change, a terminal is associated with a small cell, and a small cell base station has a data packet arrival, etc.
  • the activation mode can be divided into dynamic on/off mode, semi-static on/off mode, and/or other modes (such as static on/off mode).
  • Step S105 Macro (transmitting the activation command and/or the activation mode indication may also be a cluster-head, the small cell base station itself or a neighboring base station of the small cell) transmitting an activation command and/or an activation mode indication to the dormant small cell base station. And a neighboring cell base station and/or a UE that sleeps the small cell.
  • Step S106 The small cell base station enters the active state from the dormant state, and starts to transmit the reference signal, the common channel, and the like, and sends the data packet to the terminal UE.
  • the reference signal, the downlink channel, and the data may be transmitted before the first data is transmitted to the terminal.
  • the dormant small cell base station After the dormant small cell base station is activated, it may need to enter the Handover or SCell activation/deactivation before sending the first data to the terminal. data pack.
  • the on/off mode indicates a switching mode in which the small cell base station sleeps and activates.
  • the signal sent by the small cell base station may be a PSS (Primary Synchronization Signal) or a Secondary Synchronization Signal (SSS) before the first data packet is sent to the terminal.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • Signal Signal
  • CS Cell-Special Reference Signal
  • CSI-S Channel State Information - Reference Signal
  • PBCH Physical Broadcast Channel
  • discovery signal Wait For the dynamic on/off mode, after the dormant small cell base station is activated, the reference signal, the downlink channel, and the data may be transmitted
  • the small cell base station state switching method includes the following steps:
  • the UE1 receives the downlink discovery signal transmitted by the nearby small cell base station, and all of the small cell base stations form the discovery set of the UE1.
  • the discovery set of UE1 is Al, and some small cell base stations in A1 may be restricted to UE1, that is, UE1 cannot be served.
  • the UE1 may perform discovery detection and RSRP/SRQ (eference Signal Received Power I Reference Signal Received Quality) measurement on the received signal according to the received discovery signal sent by each small cell base station;
  • RSRP/SRQ Reference Signal Received Power I Reference Signal Received Quality
  • the UE1 reports the measurement results and the discovery situation to the primary serving cell PCell, and the measured small cell base stations form a measurement set. For example, the discovery signal measurement sent by the eight small cell base stations can be reported, and the eight cells can form the measurement set B1, and the UE1 reports the measurement results and the discovery situation in the measurement set B1 to the primary serving cell PCell; d.
  • the primary serving cell PCell may determine a handover set for the UE1, such as an ON/OFF candidate set, and may configure or add a small cell base station in the ON/OFF candidate set as a secondary of the UE.
  • Serving cell SCell Serving cell SCell. The UE 1 is notified of the ON/OFF candidate set and the SCell addition or deletion of the UE.
  • the small cells with the top three cell discovery quality in the above measurement set may be composed of the ON/OFF candidate set C1; e.
  • the ON/OFF candidate set C1 When there is a trigger demand in the uplink, downlink, or uplink and downlink (such as a change in service status, or The UE associates with the small cell, or has a packet arrives, etc., and starts the normal ON/OFF process.
  • the small cell base station state switching method includes the following steps:
  • the UE2 receives the downlink discovery signal sent by the nearby small cell base station, and all of the small cell base stations can be defined as the discovery set of the UE2.
  • the discovery set of UE2 is A2, and some small cell base stations in A2 may be restricted to UE2, that is, cannot serve UE2.
  • UE2 may perform discovery detection and RSRP/RSRQ (eference Signal Received Power I Reference Signal Received Quality) measurement based on the received discovery signals sent by each small cell;
  • RSRP/RSRQ Reference Signal Received Power I Reference Signal Received Quality
  • UE2 reports the measurement results and the discovery situation to the primary serving cell, and the measured small cell base stations form a measurement set. For example, the discovery signal measurement sent by the eight small cells can be reported.
  • the eight small cell base stations can form the measurement set B2, and the UE2 reports the measurement result and the discovery result of each small cell base station discovery signal in the measurement set B2 to the primary.
  • Service area For example, the discovery signal measurement sent by the eight small cells can be reported.
  • the eight small cell base stations can form the measurement set B2, and the UE2 reports the measurement result and the discovery result of each small cell base station discovery signal in the measurement set B2 to the primary.
  • the primary serving cell may determine an N/OFF candidate set for the UE, and may configure or add the small cell base station in the ON/OFF candidate set as the CoMP set of the UE.
  • the UE 2 is notified of the ON/OFF candidate set and the CoMP set of the UE. For example, the signal quality of 8 small cells in the above measurement set can be found.
  • the top three small cells form an ON/OFF candidate set C2; the ON/OFF candidate set corresponds to the handover set described in Embodiment 1 or Embodiment 2.
  • the normal ON/OFF process begins.
  • the small cell base station state switching method includes the following steps:
  • the terminal UE3 receives the downlink discovery signal transmitted by the nearby small cell base station, and all of the small cell base stations form the discovery set of the UE3.
  • the discovery set of UE3 is A3, and some small cell base stations in A3 may be restricted to UE3, that is, cannot serve UE3.
  • UE3 may perform discovery detection and RSRP/SRQ (eference Signal Received Power I Reference Signal Received Quality) measurement based on the received discovery signals sent by each small cell base station;
  • RSRP/SRQ reference Signal Received Power I Reference Signal Received Quality
  • the UE3 reports the measurement results and the discovery status to the primary base station MeNB (Master eNodeB, the primary base station), and these measured small cells are the measurement sets of the UE3. For example, the discovery signal measurement sent by the eight small cell base stations can be reported, and the eight cells can form the measurement set B3, and the UE3 reports the measurement result and the discovery status of each small cell in the measurement set B3 to the primary base station MeNB;
  • MeNB Master eNodeB, the primary base station
  • the primary base station MeNB may determine an ON/OFF candidate set for the UE, and may configure or add the small cell base station in the ON/OFF candidate set as the SeNB of the UE (Secondary eNodeB) , secondary base station ;).
  • the UE's ON/OFF candidate set and SeNB addition and/or deletion are notified to UE3.
  • the small cells with the first three signal quality rankings in the above-mentioned measurement set may be composed of the ON/OFF candidate set C3;
  • the relative delay of the Xn interface, the X2 interface, and the air interface may also cause interference and the UE misjudges the handover time point. Therefore, the activation of the dormant small cell base station can select a new activation mode; how to achieve the following is as follows:
  • the macro when a small cell is turned off, the macro (or Cluster-head, or the small cell itself or the neighboring cell) sends a sleep mode indication, and a signal pattern of the first signal, and the like, to the sleepy small cell base station, a sleeping cell small cell neighboring cell base station and/or a terminal UE;
  • the Macro (or Cluster-head, or small cell itself or neighboring cell) can send only the discovery signal to the dormant small cell, and/or its neighbors, and/or UE. That is to say, using a fixed sleep mode;
  • the dormant small cell base station performs corresponding signal transmission according to the indicated or determined sleep mode and the dormant configuration (may be only the corresponding configuration of the discovery signal);
  • the UE receives the sleep mode indication and the dormant configuration sent by the network side (which may be only the corresponding configuration of the discovery signal), receives and measures the discovery signal, and then reports the measurement result to the network side; d.
  • the network side may perform the measurement result reported by the UE,
  • the dual-cell addition and deletion operations are performed on the measurement small cell base station (including the sleeping small cell) reported by the UE.
  • the network may configure the small cell base station to be dormant as the SeNB;
  • the MeNB may send a sleep mode, an activation mode, and operation indication information to the small cell base station.
  • the operation indication information is used to indicate that the small cell base station independently or cooperatively completes the state switching; when the operation indication information indicates that the small cell base station independently performs the state switching, the small cell base station separately completes the state switching according to the state switching information; When the indication information indicates that the small cell base station cooperates to complete the state switching, the small cell base station needs to perform state switching.
  • the MeNB may consider changing the transmission status of the dormant SeNB according to current service requirements or interference, etc., so that the SeNB can be activated more quickly. For example, if the current MeNB has a heavy load, or when the service is heavy, it presents a discontinuous service state, and the SeNB has a requirement to be activated at any time. At this time, the MeNB sends a signal pattern and a transmission configuration in a Discontinuous Transmission ON (DTX-ON) state to the SeNB and the UE;
  • DTX-ON Discontinuous Transmission ON
  • the DTX ON state is a substate of the sleep state; in the DTX-ON state, the dormant cell periodically turns on its transmitter, transmitting a discovery signal and other necessary downlink signals.
  • the small cell base station is in the discontinuous transmission off DTX-OFF state, no signal is sent.
  • the signal pattern in the DTX-ON state includes information such as signal period and duration;
  • the small cell base station may transmit: (1) a discovery signal for being discovered by the terminal; (2) PSS/SSS (primary synchronization/secondary synchronization) and/or CRS (cell specific reference signal), for Synchronization of the terminal with the small cell base station.
  • the transmission periods of these signals may be inconsistent.
  • the transmission configuration refers to the signal type and transmission parameters sent by the SeNB during the DTX-ON period.
  • the SeNB After receiving the signal pattern and transmission configuration in the DTX-ON state sent by the MeNB, the SeNB sends a corresponding signal during the DTX-ON period according to the signal pattern and the transmission configuration in the DTX-ON state.
  • the UE receives these signals in a corresponding discontinuous reception state (DRX_ON), and measures feedback to the SeNB;
  • the SeNB changes the discontinuous transmission state DTX. Status, enter the open state, and send downlink packets to the UE.
  • the trigger condition such as the arrival of the packet (the uplink UE is triggered by the random access channel RACH or the Scheduling Request (SR), or the downlink downlink physical control channel PDCCH command is triggered)
  • the SeNB changes the discontinuous transmission state DTX. Status, enter the open state, and send downlink packets to the UE.
  • the trigger condition such as the arrival of the packet (the uplink UE is triggered by the random access channel RACH or the Scheduling Request (SR), or the downlink downlink physical control channel PDCCH command is triggered)
  • the SeNB changes the discontinuous transmission state DTX. Status, enter the open state, and send downlink packets to the UE.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the units may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing storage medium includes: a removable storage device, a read only memory (ROM), a magnetic disk or an optical disk, and the like, which can store program codes.
  • an embodiment of the present invention further provides a computer storage medium, wherein a computer program is stored, and the computer program is used to perform a small cell base station state switching method according to an embodiment of the present invention.

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Abstract

本发明公开了一种小小区基站状态切换方法及装置、计算机存储介质，涉及无线通信领域。所述方法包括：获取包括状态切换模式的状态切换信息及根据所述状态切换信息进行小小区基站状态切换。

Description

小小区基站状态切换方法及装置、 计算机存储介质 技术领域
本发明涉及无线通信领域的小小区基站状态切换技术， 尤其涉及一种 小小区基站状态切换方法及装置、 计算机存储介质。 背景技术
随着移动互联网的迅速发展以及智能终端的日益普及， 用户对数据传 输速率以及用户体验要求越来越高。 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， 可以釆用异构网的组网架构， 即在宏 区覆盖区域内部署大量小小区 （small cell )。
密集 small cell的部署是提高网络容量和降低覆盖空洞的有效机制， 但 是也会导致小小区之间干扰问题严重以及小小区能耗增加。 故为了降低小 小区之间的相互干扰及小小区基站的能耗， 适当的时候需要使小小区基站 进入低能耗的休眠状态。 针对使小小区基站进入休眠状态及如何激活处于 休眠状态的小小区， 现有技术当中提出了几种模式， 但是每一种模式都有 各自的优缺点。
如何在同一小小区基站实现多种休眠模式或激活模式的兼容和选择， 是现有技术需要解决的一个问题。 发明内容
为解决现有存在的技术问题， 本发明实施例提供一种小小区基站状态 切换方法及装置、 计算机存储介质。
本发明实施例的技术方案是这样实现的：
本发明实施例提供一种小小区基站状态切换方法， 所述方法包括： 获取包括状态切换模式的状态切换信息；
根据所述状态切换信息进行小小区基站状态切换。
本发明实施例还提供一种小小区基站状态切换装置， 所述装置包括： 获取单元， 用以获取包括状态切换模式的状态切换信息；
切换单元， 用以根据所述状态切换信息进行小小区基站状态切换。 本发明实施例还提供一种计算机存储介质， 其中存储有计算机程序， 该计算机程序用于执行小小区基站状态切换方法。
本发明实施例所述小小区基站状态切换方法及装置、 计算机存储介质， 根据所获取的状态切换信息进行状态的切换， 相对于现有的小小区基站根 据预先固定好的切换模式进行切换， 通过状态信息的指示能灵活的选择状 态切换模式， 以尽可能降低小小区基站功率的同时， 能保证各种终端正常 接入或切出， 以提升用户满意度。 附图说明
图 1为本发明实施例一所述的小小区基站状态切换方法的流程示意图； 图 2为本发明实施例一中小小区基站休眠方法的流程示意图； 图 3为本发明实施例一中小小区基站激活方法的流程示意图； 图 4为本发明实施例二所述的小小区基站状态切换结构示意图； 图 5为基于本发明所述的小小区状态切换方法的应用示例的流程图。 具体实施方式
以下结合具体实施例及说明书附图对本发明的技术方案做进一步的详 细阐述。
实施例一：
如图 1 所示， 本实施例提一种小小区基站状态切换方法， 所述方法包 括： 步骤 S110: 获取包括状态切换模式的状态切换信息；
步骤 S120: 根据所述状态切换信息进行小小区基站状态切换。
在本实施例中所述小小区基站的状态切换包括小小区基站由激活状态 进入休眠状态以及由休眠状态进入激活状态。
在无线网络中， 通常微小基站或小基站或家庭基站覆盖形成的小小区； 在所述小小区所在物理范围内同时可能还存在着宏基站、 其他的微小基站、 小基站或家庭基站的覆盖。 通常若干个小小区基站聚集在一起将形成簇， 簇的管理网元通常称为簇头。 所述簇头可以对应一个单独实体网元， 也可 以是现有网络管理设备上所划分出来的逻辑网元。
在所述步骤 S110中， 具体的获取休眠模式或休眠配置的方法至少包括 三种：
第一种： 需要进入休眠的小小区基站自身根据当前终端的接入情况、 终端类型、 小小区基站本身的性能、 兼容性及小小区本身及其邻区的干扰 覆盖情况， 选择状态切换模式自行生成状态切换信息。 具体的可以根据终 端的随机接入信号或根据对第一信号的反馈， 确定小小区内当前的终端接 入量、 数据流量、 终端类型等接入情况。 小小区基站本身的性能、 兼容性 等参数小小区基站可以自行提取或由管理人员预先设置。 所述小小区邻区 的干扰覆盖情况则可以通过接收管理设备或小小区邻区基站等设备所发送 的信息来获取， 实现的方法有多种， 在此就不——介绍了。
第二种： 小小区基站从小小区邻区的基站、 覆盖了所述小小区的宏小 区的宏基站或所述小小区基站的簇头接收送状态切换信息。 通常宏基站或 所述簇头在设备性能上以及逻辑划分上， 是所述小小区基站的上一级网元， 可以统筹分配调度小小区基站， 以减少无线网络联合覆盖区域内的覆盖率、 发射功率及实现各种休眠模式灵活使用， 同时保证终端的及时接入和切出， 以提升用户满意度。 第三种： 当所述小小区基站为协助其他基站的辅基站时， 所述状态切 换信息， 还可以是从小小区基站的主基站接收。 所述小小区基站的主基站 形成状态切换信息的方法可以参照小小区基站自身和 /或宏基站等基站形成 状态切换信息的方法。
以下提供三种状态切换模式：
第一动态切换模式： 小小区基站在休眠与激活状态之间切换时间的数 量级， 以子帧级计， 具有切换时间快。 由于切换时间短， 故可以迅速的从 休眠状态切换至激活状态， 能保证密集网络中终端及时的接入休眠中的小 小区， 故对于网络整体， 有利于吞吐量的提升。 但是通常传统终端 （可认 为为对应于 3GPP Release-12通信协议之前通信协议的终端）在小小区基站 由激活状态进入休眠状态时， 传统终端通常无法在如此短的时间内切入到 目标基站， 肯能导致传统终端的通信中断。
第二种： 静态切换模式， 又可称为慢切换模式， 通常切换时间的数量 级为几百毫秒到几秒之间， 可以兼容 R11 终端 （R11 终端为对应于 3GP Release 11通信协议的终端）及1 11终端之前更早版本的传统终端的切出。 具体的所述传统终端可通过 Secondary cell deactivation辅小区激活方法来 实现从小小区切换到目标小区。 但是静态切换模式无法使需要进入休眠小 区的终端及时的接入正休眠的小小区， 从而对网络的整体吞吐量可能造成 负面影响。
第三种： 半静态休眠模式， 介于动态状态模式与静态状态模式之间的 一种模式， 通常切换时间为十毫秒到几百毫秒之间。 半静态状态模式较静 态状态模式对网络在能提升网但是相对于动态休眠模式在吞吐量提升方面 的性能差一些， 但是较动态状态模式可以一定程度上兼容传统的终端在状 态切换的小小区的切出。
当所述小小区由激活状态进入休眠状态时， 所述状态切换模式包括休 眠模式指示； 所述状态切换信息还包括对应于所述休眠模式的休眠配置， 以下结合步骤 S110及步骤 S120， 提供一种小小区基站休眠方法。
如图 2所示， 所述小小区基站休眠方法包括：
步骤 S210: 获取休眠模式指示及对应于所述休眠模式的休眠配置； 步骤 S220: 根据所述休眠模式指示选择休眠模式并进入休眠； 步骤 S230: 休眠期间根据所述休眠配置发送第一信号； 其中， 其中， 所述第一信号包括发现信号、 同步信号、 信道状态信息参考信号及小小区 特定参考信号的至少其中之一。 其中所述小小区特定参考信号为根据小小 区类型以及特殊要求而设定一种或多种参考信号的组合。
其中， 所述休眠配置包括所述第一信号的信号图样和 /或功率。 所信号 图样可包括第一信号的周期及偏移量。 此外所述配置信息还可包括每一种 第一信号的发送频率、 功率以及辐射角度等信息。 当所述功率为零时， 此 时的小小区基站在休眠期间， 将不发送任何信号， 这种情况适宜如深夜等 网络流量几乎为零的时候。
所述休眠模式为动态休眠模式、 半静态休眠模式或静态休眠模式。 所 述动态休眠模式为使小小区基站由激活状态进入休眠状态的动态切换模 式； 所述静态休眠模式为使小小区基站由激活状态进入休眠状态的静态切 换模式； 所述半静态休眠模式为使小小区基站由激活状态进入休眠状态的 半静态切换模式。
此外， 所述小小区基站休眠方法还可包括步骤 S240:
所述步骤 S240: 获取调整后的休眠模式指示及休眠配置， 调整休眠模 式及第一信号； 其中， 调整后的休眠模式指示及休眠配置可是依据终端根 据所述第一信号反馈的测量结果和 /或预设调整策略所确定的。 在所述步骤 S240中， 若小小区基站的休眠模式及休眠配置发生调整之后， 则返回步骤 S210再次执行步骤 S210至步骤 S240。 所述预设调整策略为异构网络中多个小小区基站休眠协商策略， 所述 休眠协商策略为根据当前实际吞吐量以及终端分布， 可以使终端驻留较少 的小小区基站进入休眠。 所述的调整第一信号包括调整第一信号的类型、 信号图样及功率等信息的至少其中之一。
优选地， 所述小小区基站休眠方法还包括：
在休眠期间， 所述小小区基站还向终端发送调度指令；
并接收终端根据所述调度指令对所述第一信号的测量结果。
当小小区基站休眠后， 终端对第一信号进行的测量是无法直接传输到 小小区基站， 故为了接收终端的测量结果， 以方便休眠模式及休眠配置的 调整， 所述小小区基站还会向终端发送调度指令， 终端根据所述调度指令 就能将测量结果上报的小小区基站。
综合上述， 本实施例提供了一种小小区基站休眠方法， 相较于现有的 小小区休眠方法， 兼容了各种休眠模式并且能及时的根据终端上报的测量 结果和 /或网络需求等决策参考因素调整休眠模式， 以通过休眠降低功耗的 同时保证网络内足够大的吞吐量， 以提高用户满意度。
当所述小小区由休眠状态进入激活状态时， 所述状态切换模式为激活 模式指示；以下结合步骤 S110及步骤 S120，提供一种小小区基站激活方法。
如图 3所示， 所述小小区激活方法包括：
步骤 S310: 获取激活模式指示；
步骤 S320: 根据所述激活模式指示， 选择状态切换模式使小小区基站 由休眠状态进入激活状态。
所述激活模式为使小小区基站由休眠状态进入激活状态的状态切换模 式， 包括对应于动态切换模式的动态激活模式（所述动态激活模式又可称 为动态 on/off模式）、 对应于半静态切换模式的半静态激活模式（所述半静 态激活模式又可称为半静态 on/off 模式） 以及对应于静态切换模式的静态 激活模式（所述静态激活模式又可称为静态 on/off模式；)。
本实施例所述的小小区基站激活方法， 相对于现有的固定的激活方法， 能兼容和灵活选择多种激活方式， 能有效提升吞吐量。
优选地， 所述状态切换信息还发送至所述小小区邻区基站及终端， 用 以小小区与小小区邻区之间休眠模式的选择协调及干扰协调。
具体的如所述状态切换信息中的激活模式指示或激活时间等信息， 还 将发送到终端， 以告知终端小小区基站即将或已经激活了。 这样就可使终 端获知小小区基站由休眠进入到激活状态的时间， 避免将激活后小小区基 站所发送的信号被终端视为噪声， 以提升系统实际吞吐量。
本实施例所述的小小区基站激活方法， 可灵活的根据需求选择激活方 式， 能最大化实现功率降低、 各小区吞吐量及干扰协调等多方面通信性能 的提升。
所述状态切换信息还包括小小区基站状态切换的时间信息， 用以终端 根据所述时间信息向小小区基站发送信息。
所述方法还包括：
接收终端所上报的测量集合； 所述测量集合包括所述终端根据测量上 报策略从所发现的小小区基站中所选择并上报的至少一个小小区基站； 从所述测量集合中， 根据选择策略选出可进行状态切换的小小区基站， 形成切换集合； 所述选择策略可为根据测量结果， 如选取发现信号质量最 大的 N个测量结果所对应的小小区基站； 所述 N为正整数且小于或等于网 络中小小区基站的个数。
其中， 所述切换集合可以包括第一切换集合和第二切换集合； 所述第 一切换集合包括了若干可由激活状态进入休眠状态的小小区基站； 所述第 二切换集合包括若干可由休眠状态进入激活状态的小小区基站。 在具体执 行小小区基站状态切换时， 从所述切换集合中选择小小区基站， 并发送状 态切换信息。
在本实施例中所述集合可以以表的形式记录对应的小小区基站。
基站在激活状态及休眠状态下都会发送发现信号； 在激活状态下发现 信号的发送频率通常高于休眠状态下发现信号的发送频率。 在特殊的休眠 状态下， 基站也可以不发送发现信号。 终端将接收网络中基站所发的信号， 若接收到了某一基站的发现信号， 即发现了该基站， 通常将形成包括被终 端所发现基站所覆盖的基站集合， 称为发现集合。
终端发现将根据测量上报策略， 从发现集合中选择性测量并上报给基 站（在本实施例中为小小区基站、 簇头、 宏基站， 小小区邻区基站和 /或小 小区基站的主基站）， 形成测量集合。 具体的测量方式可为： 根据所述发现 信号进行 SRP/RSRQ ( eference Signal Received Power I Reference Signal Received Quality )测量。
所述测量上报策略可为终端根据网络侧的指示， 对发现集合中的某些 基站进行测量并上报， 还可是对发现集合中的所有发现信号都进行测量， 均上报给网络侧的基站或网元实体以供网络侧设备自行选择。 所述测量上 报策略有很多种， 在此就不一一赘述了。
优选地， 在形成所述切换集合后， 还向终端发送所述切换集合。 将所 述切换集合发送给终端， 使终端提前获取网络中哪些小小区基站将进行状 态切换， 以做好相应的切换准备。
优选地， 所述切换信息还包括操作指示信息； 所述操作指示信息用以 指示小小区基站独立执行状态切换或在宏基站、 簇头、 小小区邻区基站和 / 或小小区基站的主基站的协助下协同执行状态切换。 所述宏基站、 簇头、 小小区邻区基站和 /或小小区基站的主基站， 具体的通过向小小区基站发送 状态切换的参数或指令， 协调网络中各基站的状态切换。
具体地， 当所述小小区基站为辅基站时， 所述小小区基站将根据主基 站的决策执行状态切换。
综合上述， 本实施例提供了一种小小区基站状态切换方法， 能根据当 前的无线网络情况及业务需求， 灵活的配置网络中各小小区的状态及状态 切换方法， 以降低网络侧设备能耗的同时， 提供良好的通信环境。
实施例二：
如图 4所示， 本实施例提供一种小小区基站状态切换装置， 所述装置 包括：
获取单元 110， 用以获取包括状态切换模式的状态切换信息；
切换单元 120， 用以根据所述状态切换信息进行小小区基站状态切换。 所述获取单元 110 的具体结构可包括通信接口， 如接收天线， 用以从 宏基站、 簇头、 小小区相邻小区基站或小小区基站的主基站上接收所述状 态切换信息。 所述获取单元 110还可是处理器， 通过执行存储介质中的程 序或软件对数据进行处理， 形成所述的状态切换信息。 所述获取单元 110 的结构根据获取状态切换信息的方法的不同而不同。
所述切换单元 120 的具体结构可为处理器， 用以执行预先存储的程序 或软件， 完成小小区基站的状态切换。
所述处理器可是中央处理器、 单片机、 数字信号处理器或可编程阵列 等具有处理功能的电子设备。 所述程序或软件存储在存储介质中， 所述存 储介质优选为非瞬间存储介质。 所述存储介质与所述处理器可通过总线或 数据接口， 进行数据交互。
所述装置可为单独设立的设备， 也可是集成在所述小小区基站上的功 能单元或为小小区基站本身。
优选地， 所述状态切换模式为休眠模式指示； 所述状态切换信息还包 括对应于所述休眠模式的休眠配置；
所述切换单元 120具体用以根据所述休眠模式指示， 选择状态切换模 式使小小区基站由激活状态进入休眠； 所述装置还包括发送单元； 所述发 送单元， 用以休眠期间小小区基站根据所述休眠配置发送第一信号； 其中， 所述第一信号包括发现信号、 同步信号、 信道状态信息参考信号及小小区 特定参考信号的至少其中之一； 所述休眠模式为动态休眠模式、 半静态休 眠模式或静态休眠模式。 所述发送单元的具体结构可为发送天线。
所述装置还包括调整单元； 所述调整单元， 用以获取调整后的休眠模 式指示及休眠配置， 调整休眠模式及第一信号； 其中， 调整后的休眠模式 指示及休眠配置， 是依据终端根据所述第一信号反馈的测量结果和 /或预设 调整策略所确定的。 其中， 所述休眠配置包括所述第一信号的信号图样和 / 或功率。
所述发送单元， 还用以在休眠期间向终端发送调度指令；
所述装置还包括接收单元， 用以接收终端根据所述调度指令对所述第 一信号的测量结果。 所述接收单元的具体的结构可包括通信接口， 如发送 天线。
所述状态切换信息包括激活模式指示；
所述切换单元 120还用以根据所述激活模式指示， 选择状态切换模式 使小小区基站由休眠状态进入激活状态。 其中， 所述激活模式包括动态激 活模式、 半静态激活模式、 静态激活模式。
所述获取单元 110具体用以接收宏基站、 簇头和 /或小小区的邻区基站 所发送的状态切换信息， 或自行生成状态切换信息。
所述装置还用以将所述状态切换信息发送至所述小小区邻区基站及终 端， 用以小小区与小小区邻区之间休眠模式的选择协调及干扰协调。 所述 装置通过发送单元将所述状态切换信息发送给小小区邻区基站及终端。
此外， 所述状态切换信息还包括小小区基站状态切换的时间信息， 用 以终端根据所述时间信息向小小区基站发送信息。 所述装置还用以通过接收天线， 接收终端所上报的测量集合； 所述测 量集合包括所述终端根据测量上报策略从所发现的小小区基站中所选择并 上报的至少一个小小区基站， 并利用处理器从所述测量集合中， 根据选择 策略选出可进行状态切换的小小区基站， 形成切换集合；
其中， 所述切换集合可以包括第一切换集合和第二切换集合； 所述第 一切换集合包括了若干可由激活状态进入休眠状态的小小区基站； 所述第 二切换集合包括了若干可由休眠状态进入激活状态的小小区基站；
所述装置还通过发送天线等通信接口， 在形成所述切换集合后向终端 发送所述切换集合。
此外， 所述状态切换信息还包括用于指示小小区基站独立或协同执行 状态切换的操作指示信息； 所述切换单元 120， 具体用以根据所述操作指示 信息使所述小小区基站独立或协同执行状态切换。
所述切换单元 120，具体用以当所述操作指示信息指示所述小小区基站 独立执行状态切换时， 使所述小小区基站独立执行状态切换； 当所述操作 指示信息指示所述小小区基站协同执行状态切换时， 使所述小小区基站依 据所述主基站的决策协同执行切换。
本实施例所述的装置， 为实施例一所述的小小区状态切换方法提供了 具体的硬件结构， 可用于实现小小区基站状态切换方法的任一一个技术方 案， 能灵活的选择切换模式实现网络中小小区基站的切换。
以下是结合实施例一及实施例二， 提供几个具体应用示例。
示例一：
一种小小区状态切换方法包括：
步骤 S101 : 当有小小区基站需要休眠时， Macro宏基站或 Cluster-head 簇头、 或待休眠小小区的邻区基站发送休眠模式指示及小小区基站休眠期 间所发信信号的配置信息给该休眠待休眠小小区基站、 和 /或其邻区、 和 / 或终端 UE。在具体的实现过程中所述休眠指示及配置信息也可以由小小区 基站自行生成。 所述配置信息可包括小小区基站休眠期间所发信号的信号 图样。 所述信号图样通常对应了小小区基站休眠期间所发信号的周期、 偏 移量、 辐射角度以及辐射范围等信息。 所述配置信息还可包括所发信号功 率的相对值或绝对值等信息。
步骤 S102: 待休眠小小区基站根据所述休眠模式指示中被指示的或确 定的休眠模式进行如休眠， 且在休眠期间根据配置信息发送信号。 所述信 号包括发现信号、 CSI-RS ( Channel State Information - Reference Signal, 信 道状态信息参考信号）和 /或其他用于测量及同步的信号。
步骤 S103 : 终端接收网络侧发送的休眠模式指示和配置信息及所述步 骤 S102中所发送的信号， 并根据所接收的信号等进行测量， 并将测量结果 上报给服务该终端的小区基站。 终端的服务小区基站有可能为宏基站 Macro,休眠小小区的邻区或休眠小小区基站自身。如果 Macro、 Cluster-head 或休眠小小区基站接收到终端的测量结果， 基于测量结果及 UE种类等原 因， 确定出需要更新休眠小小区基站的休眠模式时， 则需要重新执行从步 骤 S101到本步骤的操作。
步骤 S104: 如满足触发条件（所述触发条件可为： 业务状况变化、 终 端与小小区关联并更或小小区基站有数据包到达等）， Macro或 Cluster-head 或休眠小小区基站更新参数配置和选择相应的激活模式激活休眠中的小小 区基站； 激活模式可以分为动态 on/off模式、 半静态 on/off模式和 /或其他 模式（如静态 on/off模式）。 在选择时可以综合考虑休眠模式、 各休眠模式 对应的小小区基站性能及兼容性等因素。
步骤 S105 : Macro (发送所述激活命令和 /或激活模式指示的还可是 Cluster-head, 小小区基站本身或小小区的邻区基站）发送激活命令和 /或激 活模式指示给休眠的小小区基站、 休眠小小区的邻区基站和 /或 UE。 步骤 S106: 小小区基站从休眠状态进入到激活状态， 并开始发送参考 信号和公共信道等， 向给终端 UE发送数据包。 对于动态 on/off模式， 休眠 小小区基站激活后在发送第一个数据给终端之前， 可以发送参考信号、 下 行信道和数据。对于半静态 on/off模式和静态 on/off模式，休眠小小区基站 激活后在发送第一个数据给终端之前， 可能需要进过 Handover或 SCell激 活 /去激活等操作后才开始发送第一个数据包。 其中所述 on/off模式表示小 小区基站休眠和激活的切换模式。 在具体的实现过程中所述小小区基站激 活后在向所述终端发送第一个数据包之前，所发送的信号可是 PSS( Primary Synchronization Signal,主同步信号 )、 SSS( Secondary Synchronization Signal, 辅同步信号）、 C S ( Cell-special Reference Signal, 小区特定参考信号）、 CSI- S ( Channel State Information - Reference Signal, 信道状态信息参考信 号）、 PBCH ( Physical Broadcast Channel, 物理广播信道）和 /或发现信号等。
示例二：
针对 CA (载波聚合， Carrier Aggregation )应用场景， 小小区基站状态 切换方法包括以下步骤：
a.终端 UE1 接收到附近小小区基站发送的下行发现信号， 所有这 些小小区基站形成 UE1的发现集合。 例如此次 UE1的发现集合为 Al， A1中的某些小小区基站有可能是对 UE1受限的， 即不能服务 UE1。
b. UE1可以基于接收到的各个小小区基站所发送的发现信号，并对 所述发现信号进行发现检测及 RSRP/ SRQ ( eference Signal Received Power I Reference Signal Received Quality )测量；
c. UE1把各测量结果以及发现情况上报给主服务小区 PCell, 这些 被测量上报的小小区基站形成测量集合。 例如有 8个小小区基站发送的 发现信号测量可供上报， 这 8个小区可以组成测量集合 Bl， 则 UE1将 测量集合 B1中各测量结果以及发现情况上报给主服务小区 PCell; d.主服务小区 PCell接收到测量集合后，可以确定针对所述 UE1的 切换集合， 如 ON/OFF候选集合， 并且可以把 ON/OFF候选集合中的小 小区基站配置或添加为该 UE的辅服务小区 SCell。并将该 UE的 ON/OFF 候选集和 SCell添加或删除情况通知给 UE1。 例如可将上述测量集合中 8个小小区发现信号质量排名前三的小小区组成 ON/OFF候选集合 C1； e. 当有上行、 下行或上下行都有触发需求时（如业务状况变化、 或 UE与小小区关联、 或有包到达等）， 开始执行正常的 ON/OFF流程。
示例三：
针对 CoMP (多点协作， Coordinated multi-point )应用场景， 小小 区基站状态切换方法包括以下步骤：
a.终端 UE2接收到附近小小区基站发送的下行发现信号，所有这些 小小区基站可以定义为 UE2的发现集合。 例如此次 UE2的发现集合为 A2, A2中的某些小小区基站有可能是对 UE2受限的，即不能服务 UE2。
b. UE2 可以基于接收到的各个小小区发送的发现信号进行发现检 测和 RSRP/RSRQ ( eference Signal Received Power I Reference Signal Received Quality )测量；
c. UE2把各测量结果以及发现情况上报给主服务小区，这些被测量 上报的小小区基站形成测量集合。 例如有 8个小小区发送的发现信号测 量可供上报， 这 8个小小区基站可以组成测量集合 B2， 则 UE2将测量 集合 B2 中各基于小小区基站发现信号的测量结果以及发现情况上报给 主服务小区；
d.主服务小区接收到测量集合的测量结果后， 可以确定针对该 UE 的 N/OFF候选集合，并且可以把 ON/OFF候选集合中的小小区基站配置 或添加为该 UE的 CoMP集合。并将该 UE的 ON/OFF候选集合和 CoMP 集合情况通知给 UE2。 例如可将上述测量集合中 8个小小区发现信号质 量排名前三的小小区组成 ON/OFF候选集合 C2; 所述 ON/OFF候选集 合对应于实施例一或实施例二所述的切换集合。
e. 当有上行、 下行或上下行都有触发需求时（如业务状况变化、 或 UE与小小区关联、 或有包到达等）， 开始执行正常的 ON/OFF流程。
示例四：
针对双连接 ( Dual Connectivity )场景， 小小区基站状态切换方法包括 以下步骤：
a.终端 UE3接收到附近小小区基站发送的下行发现信号，所有这些 小小区基站形成了 UE3的发现集合。 例如此次 UE3的发现集合为 A3， A3中的某些小小区基站有可能是对 UE3受限的， 即不能服务 UE3。
b. UE3 可以基于接收到的各个小小区基站发送的发现信号进行发 现检测和 RSRP/ SRQ ( eference Signal Received Power I Reference Signal Received Quality )测量；
c. UE3 把各测量结果以及发现情况上报给主基站 MeNB ( Master eNodeB, 主基站）， 这些被测量上报的小小区为 UE3的测量集合。 例如 有 8个小小区基站发送的发现信号测量可供上报， 这 8个小区可以组成 测量集合 B3， 则 UE3将测量集合 B3 中各个小小区的测量结果以及发 现情况上报给主基站 MeNB;
d.主基站 MeNB接收到测量集合的测量结果后， 可以确定针对该 UE的 ON/OFF候选集合， 并且可以把 ON/OFF候选集合中的小小区基 站配置或添加为该 UE的 SeNB ( Secondary eNodeB, 辅基站；)。 并将该 UE的 ON/OFF候选集合和 SeNB添加和 /或删除情况通知给 UE3。 例如 可将上述测量集合中 8 个小小区发现信号质量排名前三的小小区组成 ON/OFF候选集合 C3;
e. 当有上行、 下行或上下行都有触发需求时（如业务状况变化、 或 UE与小小区关联、 或有包到达等）， 开始执行正常的 ON/OFF流程。 示例五：
对于双连接 ( Dual Connectivity ) 场景， 由于非理想回传 Non-ideal backhaul 因素， 通信节点 （小小区基站与终端或基站之间）之间的传输时 ¾>=20ms, 会导致切换时间加大， 且 Xn接口、 X2接口和空口的相对时延 也会导致干扰和 UE对切换时间点误判。所以休眠小小区基站的激活可选择 一种新的激活方式； 具体如何实现如下：
a. 首先，当某个 small cell关闭时， Macro (或 Cluster-head、或 small cell 自身或邻区）发送休眠模式指示、 和第一信号的信号图样等休眠配 置给该待休眠小小区基站、 待休眠小小区邻区基站和 /或终端 UE;
如果考虑降低干扰和节省功耗， Macro (或 Cluster-head、或 small cell 自身或邻区）可以仅发送发现信号相应配置给该休眠 small cell, 和 /或其 邻区、 和 /或 UE， 也就是说釆用固定的休眠方式；
b. 待休眠小小区基站 根据被指示的或确定的休眠模式和休眠配置 (可仅仅是发现信号相应配置）进行相应的信号发送；
c UE接收网络侧发送的休眠模式指示和休眠配置 （可仅仅是发现 信号的相应配置）， 接收并测量发现信号， 然后上报测量结果给网络侧； d. 网络侧根据 UE上报的测量结果， 可以对 UE上报的测量小小区 基站（包括休眠 small cell )进行双连接添加和删除操作。 例如网络可以 将待休眠的小小区基站配置为 SeNB;
e. MeNB可以发送休眠模式、 激活模式和操作指示信息给小小区基 站。 所述操作指示信息用以指示小小区基站独立或协同完成状态切换； 当操作指示信息指示小小区基站独立执行状态切换时， 所述小小区基站 单独根据状态切换信息完成状态切换； 当所述操作指示信息指示小小区 基站协同完成状态切换时， 则所述小小区基站在进行状态切换时， 还需 要接收主基站的决策， 再根据所述状态切换信息及决策进行状态切换； f. 小小区基站接收主基站所发送的状态切换信息， 依据休眠模式、 激活模式及所述操作指信息以及决策， 进行状态切换；
g. MeNB 可根据当前的业务需求或干扰等情况， 考虑更改休眠 SeNB的发送状况， 以便可以更快的激活 SeNB。 例如， 当前 MeNB已负 载较重、 或业务时重时轻呈现不连续服务状态， SeNB 有随时被激活的 需求。此时， MeNB发送不连续传输打开（ Discontinuous Transmission ON, DTX— ON )状态下的信号图样和发送配置给 SeNB和 UE;
DTX ON状态为休眠状态的一种子状态；在 DTX-ON状态下即休眠 小区会周期性的打开其发射机， 发送发现信号和其他必要的下行信号。 当小小区基站处于不连续传输关闭 DTX— OFF状态， 不发送任何信号。
DTX— ON状态下的信号图样包括信号周期以及持续时间等信息；
DTX— ON状态下小小区基站有可能发送： （1 )发现信号， 用于被终 端发现； （2 ) PSS/SSS (主同步 /辅同步)和 /或 CRS (小区特定参考信号）， 用于终端与小小区基站的同步。 这几种信号的发送周期有可能不一致。 当小区处于 DTX— ON状态时，有可能发送其中一种或几种信号。发送配 置是指 SeNB在 DTX— ON期间内所述发送的信号类型及发送参数。
h. 休眠 SeNB接收到 MeNB发送的 DTX— ON状态下的信号图样和 发送配置后， 按照 DTX— ON状态下的信号图样和发送配置在 DTX— ON 期间发送相应信号。 UE 在相应的不连续接收状态下 （Discontinuous Receive ON, DRX— ON )接收这些信号， 并测量反馈给 SeNB;
i. 当满足触发条件如包到达（上行 UE通过随机接入信道 RACH或 调度请求（ Scheduling Request, SR )来触发， 或下行发送物理下行控制 信道 PDCCH命令来触发）， SeNB改变不连续传输状态 DTX状态，进入 打开状态， 发送下行数据包给 UE。 在本申请所提供的几个实施例中， 应该理解到， 所揭露的设备和方法， 可以通过其它的方式实现。 以上所描述的设备实施例仅仅是示意性的， 例 如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可以有另外 的划分方式， 如： 多个单元或组件可以结合， 或可以集成到另一个系统， 或一些特征可以忽略， 或不执行。 另外， 所显示或讨论的各组成部分相互 之间的耦合、 或直接耦合、 或通信连接可以是通过一些接口， 设备或单元 的间接耦合或通信连接， 可以是电性的、 机械的或其它形式的。
上述作为分离部件说明的单元可以是、 或也可以不是物理上分开的， 作为单元显示的部件可以是、 或也可以不是物理单元， 即可以位于一个地 方， 也可以分布到多个网络单元上； 可以根据实际的需要选择其中的部分 或全部单元来实现本实施例方案的目的。
另外， 在本发明各实施例中的各功能单元可以全部集成在一个处理模 块中， 也可以是各单元分别单独作为一个单元， 也可以两个或两个以上单 元集成在一个单元中； 上述集成的单元既可以釆用硬件的形式实现， 也可 以釆用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机 可读取存储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的存储介质包括： 移动存储设备、 只读存储器 （ROM， ead-Only Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
相应的， 本发明实施例还提供一种计算机存储介质， 其中存储有计算 机程序， 该计算机程序用于执行本发明实施例的小小区基站状态切换方法。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局 限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可 轻易想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明 的保护范围应以所述权利要求的保护范围为准。

Claims

权利要求书
1、 一种小小区基站状态切换方法， 所述方法包括：
获取包括状态切换模式的状态切换信息；
根据所述状态切换信息进行小小区基站状态切换。
2、 根据权利要求 1所述的方法， 其中， 所述状态切换模式为休眠模式 指示； 所述状态切换信息还包括对应于所述休眠模式的休眠配置；
所述根据所述状态切换信息进行小小区基站状态切换为：
根据所述休眠模式指示， 选择状态切换模式使小小区基站由激活状态 进入休眠；
所述方法还包括：
休眠期间小小区基站根据所述休眠配置发送第一信号；
其中， 所述第一信号包括发现信号、 同步信号、 信道状态信息参考信 号及小小区特定参考信号的至少其中之一。
3、 根据权利要求 2所述的方法， 其中， 所述方法还包括：
获取调整后的休眠模式指示及休眠配置， 调整休眠模式及第一信号。
4、 根据权利要求 2所述的方法， 其中， 所述休眠配置包括所述第一信 号的信号图样和 /或功率。
5、根据权利要求 2所述的方法， 其中， 所述休眠模式为动态休眠模式、 半静态休眠模式或静态休眠模式。
6、 根据权利要求 2所述的方法， 其中， 所述方法还包括：
在休眠期间向终端发送调度指令；
接收所述终端根据所述调度指令对所述第一信号的测量结果。
7、 根据权利要求 1所述的方法， 其中， 所述状态切换信息包括激活模 式指示；
所述根据所述状态切换信息进行小小区基站状态切换为： 根据所述激活模式指示， 选择状态切换模式使小小区基站由休眠状态 进入激活状态。
8、 根据权利要求 7所述的方法， 所述激活模式包括动态激活模式、 半 静态激活模式、 静态激活模式。
9、 根据权利要求 1-8任一项所述的方法， 其中， 所述获取包括状态切 换模式的状态切换信息为：
接收宏基站、 簇头和 /或小小区的邻区基站所发送的状态切换信息， 或 自行生成状态切换信息。
10、 根据权利要求 1-8任一项所述的方法， 其中， 所述方法还包括： 将 所述状态切换信息发送至所述小小区邻区基站及终端， 用以小小区与小小 区邻区之间休眠模式的选择协调及干扰协调。
11、 根据权利要求 10所述的方法， 其中， 所述状态切换信息还包括小 小区基站状态切换的时间信息， 用以终端根据所述时间信息接收小小区基 站发送的信息和向小小区基站发送信息。
12、根据权利要求 1-8任一项所述的方法， 其中， 所述状态切换信息还 包括用于指示小小区基站独立或协同执行状态切换的操作指示信息。
13、 根据权利要求 12所述的方法， 其中， 所述小小区为辅基站； 所述获取包括状态切换模式的状态切换信息为：
从所述小小区基站的主基站接收所述状态切换信息。
14、 根据权利要求 13所述的方法， 其中，
当所述操作指示信息指示所述小小区基站独立执行状态切换时， 所述 小小区基站独立执行状态切换；
当所述操作指示信息指示所述小小区基站协同执行状态切换时， 所述 小小区基站依据所述主基站的决策执行状态切换。
15、 根据权利要求 1-8任一项所述的方法， 其中， 所述方法还包括： 接收终端所上报的测量集合； 所述测量集合包括所述终端根据测量上 报策略从所发现的小小区基站中选择并上报的至少一个小小区基站；
从所述测量集合中， 根据选择策略选出可进行状态切换的小小区基站， 形成切换集合；
其中， 所述切换集合可以包括第一切换集合和第二切换集合； 所述第 一切换集合包括了若干可由激活状态进入休眠状态的小小区基站； 所述第 二切换集合包括若干可由休眠状态进入激活状态的小小区基站。
16、 根据权利要求 15所述的方法， 其中， 在形成所述切换集合后， 还 向终端发送所述切换集合。
17、 一种小小区基站状态切换装置， 所述装置包括：
获取单元， 用以获取包括状态切换模式的状态切换信息；
切换单元， 用以根据所述状态切换信息进行小小区基站状态切换。
18、 根据权利要求 17所述的装置， 其中， 所述状态切换模式为休眠模 式指示； 所述状态切换信息还包括对应于所述休眠模式的休眠配置；
所述切换单元具体用以根据所述休眠模式指示， 选择状态切换模式使 小小区基站由激活状态进入休眠；
所述装置还包括发送单元；
所述发送单元， 用以休眠期间小小区基站根据所述休眠配置发送第一 信号；
其中， 所述第一信号包括发现信号、 同步信号、 信道状态信息参考信 号及小小区特定参考信号的至少其中之一。
19、 根据权利要求 17所述的装置， 其中， 所述状态切换信息包括激活 模式指示；
所述切换单元具体用以根据所述激活模式指示， 选择状态切换模式使 小小区基站由休眠状态进入激活状态。
20、 一种计算机存储介质， 其中存储有计算机程序， 该计算机程序用 于执行权利要求 1至 16任一项所述的小小区基站状态切换方法。
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US9961714B2 (en) 2018-05-01
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