WO2016045477A1 - 无线通信系统中的装置和方法 - Google Patents

无线通信系统中的装置和方法 Download PDF

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Publication number
WO2016045477A1
WO2016045477A1 PCT/CN2015/088001 CN2015088001W WO2016045477A1 WO 2016045477 A1 WO2016045477 A1 WO 2016045477A1 CN 2015088001 W CN2015088001 W CN 2015088001W WO 2016045477 A1 WO2016045477 A1 WO 2016045477A1
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WIPO (PCT)
Prior art keywords
cell
small cell
cluster
physical cell
physical
Prior art date
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Ceased
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PCT/CN2015/088001
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English (en)
French (fr)
Inventor
崔琪楣
蒋琴艳
高苇娟
覃忠宾
张彤
梁辉
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Sony Corp
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Sony Corp
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Priority to US15/503,274 priority Critical patent/US10244387B2/en
Priority to EP15844000.8A priority patent/EP3188530B1/en
Publication of WO2016045477A1 publication Critical patent/WO2016045477A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/30—Managing network names, e.g. use of aliases or nicknames
    • H04L61/3005—Mechanisms for avoiding name conflicts
    • 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
    • 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. 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
    • 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 disclosure relates to the field of wireless communication technologies, and more particularly, to an apparatus and method in a wireless communication system for dynamically managing a physical cell identity in a small cell deployment and an on/off scenario, and a cell search and access procedure in this case .
  • a physical cell ID may identify an evolved Node B (eNB)/small cell at the physical layer. Since the physical cell identifier is closely related to the scrambling sequence generation, cell search, resource mapping and other mechanisms in the LTE-A system, the physical cell identifier plays an important role in the physical layer.
  • the physical cell identifier is an important decision information used for the generation of the scrambling sequence in the physical channel, and plays a key role in reducing the interference of the control channel and the broadcast channel.
  • the physical cell identifier corresponds to a Primary Synchronization Signal (PSS)/Secondary Synchronization Signal (SSS) sequence, a Cell-specific Reference Signal (CRS), and the like.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Cell-specific Reference Signal
  • the frequency offset values of the specific reference signal and control channel resource mapping are closely related. Therefore, in order to avoid interference between adjacent cells, especially between intra-frequency cells, it is necessary to properly allocate 504 physical cell identifiers.
  • the planning method is mainly used to allocate a fixed physical cell identifier to the cell at the beginning of the cell deployment, and if it needs to be modified, it needs to be configured manually.
  • inter-cell interference will be more serious. Therefore, the prior art method will bring great cost of cell planning and maintenance, and lack flexibility and difficulty in adapting.
  • the automatic configuration mechanism such as plug and play is also difficult to meet the requirements of a more flexible unplanned small cell deployment scenario.
  • an object of the present disclosure is to provide an apparatus and method for wirelessly managing a physical cell identity in a small cell deployment and an on/off scenario, which overcomes the problems in the prior art. Reduced cell planning burden and maintenance costs and increased flexibility.
  • an apparatus in a wireless communication system comprising: an access determining unit configured to determine an access requirement of a user equipment; and a control unit configured to be based on the user equipment
  • the target small cell where the device is located is switched from the off state to the on state, and the target small cell is newly allocated a new physical cell identifier different from the physical cell identifier used in the off state.
  • an apparatus in a wireless communication system comprising: a determining unit configured to measure a discovery reference signal of a neighboring small cell according to a user equipment served by a serving cell where the apparatus is located As a result, it is determined whether the user equipment needs to access from the serving cell to the target small cell in the neighboring small cell; the transceiver unit is configured to, in the case that the determining unit determines that the serving cell needs to access the target small cell, to the target small cell.
  • the target small cell Transmitting an access request and receiving a response to the access request from the target small cell; and indicating, configured to send an indication to the user equipment according to the response, the indication including control information for accessing the target small cell, such that the user equipment Accessing to the target small cell according to the new physical cell identity of the target small cell.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state and is different from the physical cell identifier in the closed state.
  • a user equipment side device in a wireless communication system, the device comprising: a transceiver unit configured to transmit a measurement result of a user equipment to a discovery reference signal of a neighboring small cell to a serving cell, and receiving, from the serving cell, an access indication for accessing a target small cell in the neighboring small cell, the serving cell is a cell currently serving the user equipment; and a control unit configured to acquire the target based on the access indication A new physical cell identifier of the cell, to control the user equipment to access the target small cell according to the new physical cell identifier.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state and is different from the physical cell identifier in the closed state.
  • an apparatus in a wireless communication system comprising: a grouping unit configured to compare objects according to values of physical cell identifiers in a predetermined grouping manner And the physical cell identifier allocation unit is configured to dynamically set each small cell in the small cell cluster based on the group of the physical cell identifier, based on the on/off state of each small cell in the small cell cluster Assign a physical cell identity.
  • the physical cell identifier in the closed state of each small cell is different from the physical cell identifier in the open state.
  • a method in a wireless communication system comprising: an access determining step of determining an access requirement of a user equipment; and a controlling step for connecting based on the user equipment Into the demand, the target small cell is switched from the off state to the on state, and the target small cell is newly allocated a new physical cell identifier different from the physical cell identifier used in the off state.
  • a method in a wireless communication system comprising: a determining step of determining a user according to a measurement result of a discovery reference signal of a neighboring small cell by a user equipment served by a serving cell Whether the device needs to access from the serving cell to the target small cell in the neighboring small cell; and the transmitting and receiving step is configured to send an access request to the target small cell and the target from the target when determining that the serving cell needs to access the target small cell Receiving, by the small cell, a response to the access request, and an indicating step, configured to send, according to the response, an indication to the user equipment, where the indication includes control information for accessing the target small cell, so that the user equipment is configured according to the new physical cell of the target small cell The identity is accessed to the target small cell.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state
  • a method in a wireless communication system comprising: a transceiving step of transmitting a measurement result of a discovery reference signal of a user equipment to a neighboring small cell to a serving cell, and The serving cell receives an access indication for accessing a target small cell in the neighboring small cell, the serving cell is a cell currently serving the user equipment; and a control step of acquiring a new physical cell identifier of the target small cell based on the access indication And controlling the user equipment to access the target small cell according to the new physical cell identifier.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state and is different from the physical cell identifier in the closed state.
  • a method in a wireless communication system comprising: a grouping step of grouping physical cell identifiers according to values of physical cell identifiers in a predetermined grouping manner; and physical cell identifiers And an allocating step, configured to dynamically allocate a physical cell identifier to each small cell in the small cell cluster based on the on/off state of each small cell in the small cell cluster, according to at least the group of the physical cell identifier.
  • the physical cell identifier in the closed state of each small cell is different from the physical cell identifier in the open state.
  • a storage medium comprising machine readable program code, when executed on an information processing device, the program code causing the information processing device to perform the following steps Method: an access determining step, configured to determine an access requirement of a user equipment; and a control step, configured to convert the target small cell from a closed state to an open state based on an access requirement of the user equipment, and re-allocate the target small cell A new physical cell identity that is different from the physical cell identity used by the shutdown state.
  • a storage medium comprising machine readable program code, when executed on an information processing device, the program code causing the information processing device to perform the following steps
  • the determining step is configured to determine, according to the measurement result of the discovery reference signal of the neighboring small cell by the user equipment served by the serving cell, whether the user equipment needs to access from the serving cell to the target small cell in the neighboring small cell; And in the case of determining that the access to the target small cell is required from the serving cell, sending an access request to the target small cell and receiving a response to the access request from the target small cell; and indicating a step for responding to the user equipment according to the response And transmitting an indication, where the indication includes control information that is accessed to the target small cell, so that the user equipment accesses the target small cell according to the new physical cell identifier of the target small cell.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state
  • a storage medium comprising machine readable program code, when executed on an information processing device, the program code causing the information processing device to perform the following steps
  • the method includes: a sending and receiving step, configured to send, by a user equipment, a measurement result of a discovery reference signal of a neighboring small cell to a serving cell, and receive, from the serving cell, an access indication for accessing a target small cell in a neighboring small cell, the serving cell a cell that is currently serving the user equipment; and a control step, configured to acquire a new physical cell identifier of the target small cell based on the access indication, to control the user equipment to access the target small cell according to the new physical cell identifier.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state and is different from the physical cell identifier in the closed state.
  • a storage medium comprising machine readable program code, when executed on an information processing device, the program code causing the information processing device to perform the following steps
  • the open/closed state of the zone dynamically assigns physical cell identities to each small cell within the small cell cluster.
  • the physical cell identifier in the closed state of each small cell is different from the physical cell identifier in the open state.
  • a program product comprising machine-executable instructions that, when executed on an information processing device, cause the information processing device to perform a method comprising the steps of: And a determining step, configured to determine an access requirement of the user equipment, and a control step, configured to convert the target small cell from a closed state to an open state according to the access requirement of the user equipment, and re-allocate and close the target small cell
  • a determining step configured to determine an access requirement of the user equipment
  • a control step configured to convert the target small cell from a closed state to an open state according to the access requirement of the user equipment, and re-allocate and close the target small cell
  • the physical cells used identify different new physical cell identities.
  • a program product comprising machine-executable instructions that, when executed on an information processing device, cause the information processing device to perform a method comprising the steps of: determining a step of determining, according to a measurement result of the discovery reference signal of the neighboring small cell, that the user equipment served by the serving cell needs to access the target cell from the serving cell to the target small cell in the neighboring small cell; and transmitting and receiving steps for determining If the serving cell needs to access the target small cell, send an access request to the target small cell and receive a response to the access request from the target small cell; and an indicating step, configured to send an indication to the user equipment according to the response,
  • the indication includes control information that is accessed to the target small cell such that the user equipment accesses the target small cell according to the new physical cell identity of the target small cell.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open
  • a program product comprising machine-executable instructions that, when executed on an information processing device, cause the information processing device to perform a method comprising the steps of: transmitting and receiving a step of transmitting, to the serving cell, a measurement result of the discovery reference signal of the neighboring small cell by the user equipment, and receiving, from the serving cell, an access indication about accessing the target small cell in the neighboring small cell, where the serving cell is the current service a cell of the user equipment; and a control step, configured to acquire a new physical cell identifier of the target small cell based on the access indication, to control the user equipment to access the target small cell according to the new physical cell identifier.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state and is different from the physical cell identifier in the closed state.
  • a program product comprising machine executable instructions that, when executed on an information processing device, cause the information processing device to perform a method comprising the steps of: grouping a step of grouping the physical cell identifier according to the value of the physical cell identifier in a predetermined grouping manner; and assigning the physical cell identifier to the step
  • the physical cell identifier is dynamically allocated to each small cell in the small cell cluster based on the grouping of at least the physical cell identifier based on the on/off states of the respective small cells in the small cell cluster.
  • the physical cell identifier in the closed state of each small cell is different from the physical cell identifier in the open state.
  • an electronic device located in a wireless communication system and comprising circuitry configured to perform a method comprising the steps of: one or more processors An access determining step, configured to determine an access requirement of the user equipment, and a control step, configured to convert the target small cell from the off state to the on state based on the access requirement of the user equipment, and re-assign the target small cell to The physical cell used for the shutdown state identifies a different new physical cell identity.
  • an electronic device located in a wireless communication system and comprising circuitry configured to perform a method comprising the steps of: one or more processors a determining step, configured to determine, according to a measurement result of the discovery reference signal of the neighboring small cell by the user equipment served by the serving cell, whether the user equipment needs to access from the serving cell to the target small cell in the neighboring small cell; In the case of determining that access from the serving cell to the target small cell is required, transmitting an access request to the target small cell and receiving a response to the access request from the target small cell; and indicating a step for transmitting to the user equipment according to the response
  • the indication includes the control information for accessing the target small cell, so that the user equipment accesses the target small cell according to the new physical cell identifier of the target small cell.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state and is different from
  • an electronic device located in a wireless communication system and comprising circuitry configured to perform a method comprising the steps of: one or more processors And a transmitting and receiving step, configured to send, by the user equipment, a measurement result of the discovery reference signal of the neighboring small cell to the serving cell, and receive, from the serving cell, an access indication about accessing the target small cell in the neighboring small cell, where the serving cell is a cell currently serving the user equipment; and a control step of acquiring a new physical cell identifier of the target small cell based on the access indication, to control the user equipment to access the target small cell according to the new physical cell identifier.
  • the new physical cell identifier of the target small cell is a newly allocated physical cell identifier when the target small cell is to be switched from the closed state to the open state and is different from the physical cell identifier in the closed state.
  • an electronic device located in a wireless communication system and comprising circuitry configured to perform a method comprising the steps of: one or more processors : grouping step for physics based on predetermined grouping
  • the value of the cell identifier is used to group the physical cell identifier; and the physical cell identifier assigning step is configured to dynamically be in the small cell cluster based on the group of the physical cell identifier, based on the on/off state of each small cell in the small cell cluster
  • Each small cell allocates a physical cell identity.
  • the physical cell identifier in the closed state of each small cell is different from the physical cell identifier in the open state.
  • FIG. 1 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 2 is a block diagram showing another functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram showing an example of multiplexing conditions of physical cell identification between small cell clusters according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram showing another example of multiplexing conditions of physical cell identification between small cell clusters according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram showing an allocation state of physical cell identifiers of respective small cells within a small cell cluster, according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram showing an allocation state of physical cell identities of respective small cells within a small cell cluster, according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram showing an example of physical cell identity group mapping of respective small cells within a small cell cluster, according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram showing another example of physical cell identity group mapping of respective small cells within a small cell cluster, according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram showing another example of physical cell identity group mapping of respective small cells within a small cell cluster, according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram showing a signaling interaction flow for cell search and access in the case of dynamic allocation of physical cell identity, in accordance with an embodiment of the present disclosure
  • FIG. 11 is a schematic diagram showing another signaling interaction flow for cell search and access in the case of dynamic allocation of physical cell identity, in accordance with an embodiment of the present disclosure
  • FIG. 12 is a block diagram showing a functional configuration example of a device in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 13 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 14 is a block diagram showing a functional configuration example of a device on the user equipment side in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 15 is a flowchart illustrating a process example of a method in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 16 is a flowchart illustrating a process example of a method in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 17 is a flowchart illustrating a process example of a method in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 18 is a flowchart illustrating a process example of a method in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 19 is a block diagram showing an example structure of a personal computer as an information processing device that can be employed in an embodiment of the present disclosure
  • FIG. 20 is a block diagram showing an example of a schematic configuration showing a server to which the technology of the present disclosure can be applied;
  • FIG. 21 is a block diagram showing a first example of a schematic configuration of an evolved Node B (eNB) to which the technology of the present disclosure may be applied;
  • eNB evolved Node B
  • FIG. 22 shows a block diagram of a second example of a schematic configuration of an eNB to which the techniques of the present disclosure may be applied.
  • FIG. 1 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure.
  • apparatus 100 can include a packet unit 102 and a physical cell identity allocation unit 104.
  • the grouping unit 102 can be configured to group the physical cell identities according to the value of the physical cell identities in a predetermined grouping manner.
  • the predetermined grouping manner may be selected from one of the following: (1) a result based on a value of a physical cell identifier and a modulus operation of 3 (PCI-mod-3); (2) a value based on a physical cell identifier and 6 The result of the modulo operation (PCI-mod-6); and (3) the result of the modulo operation based on the value of the physical cell identity and the value of the physical cell identity and the result of the modulo operation of 6.
  • Table 1 below shows an example of the grouping situation according to the grouping method (3).
  • all PCIs or PCIs used for, for example, a specific management area are divided into six groups, and each group contains PCI modulo 3 and modulo 6 values in accordance with the values shown in the table.
  • the PCI to be grouped can be divided into three PCI packets according to the grouping mode (1), that is, only according to the value of the modulo 3.
  • the PCI values of the modulo 3 values are 0, 1, and 2 respectively. It is divided into three groups.
  • the PCI to be grouped can be divided into 6 PCI packets according to the grouping mode (2), that is, only according to the value of the modulo 6, and the details are not described herein again.
  • the physical cell identity assigning unit 104 may be configured to dynamically allocate physical cell identifiers for each small cell in the small cell cluster based on the group of the physical cell identity, based on the on/off states of the respective small cells in the small cell cluster, wherein The physical cell identifier in the closed state of each small cell is different from the physical cell identifier in the open state. In other words, the physical cell identity assignment unit 104 will re-allocate the PCI for the small cell if the small cell operating state changes, for example, from the on state to the off state.
  • the expression “on state” used in the present disclosure is sometimes also referred to as an activation state or an operation state, etc.
  • the expression “off state” is sometimes also referred to as a deactivation state or a sleep state, etc., which are synonymous.
  • descriptions will be made using the expressions “on state” and "off state”.
  • the main difference between the on state and the off state is that the small cell in the off state no longer provides a data transmission service for the user equipment.
  • the present disclosure relates to changes in operating conditions that are generally discussed in small cells, since the inventors typically only have small cells that would have a working state transition when making the inventive idea.
  • the macro cell also changes in working state (ie, transitions between the on state and the off state) or does not need to specifically distinguish between the macro cell and the small cell.
  • the solution of the present invention will be applicable to various cells that need to allocate a limited number of PCIs, not just small cells.
  • a limited PCI may be loosely multiplexed between small cells in a closed state.
  • the cell in the on state needs to provide data transmission service for the user equipment in the coverage area, and guarantees the transmission quality. Therefore, it is generally required to strictly restrict PCI multiplexing between cells in the on state, for example, prohibiting adjacent cells.
  • Cells that use the same PCI or that are not adjacent to each other but share the same neighbor cell use the same PCI to avoid problems such as synchronization signal and/or reference signal collision, confusion, or interference.
  • the small cell in the off state does not provide a data transmission service for the user equipment, so multiplexing the PCI between the small cells under relatively loose conditions does not cause serious impact.
  • the synchronization signal/reference signal transmission power of the small cell in the off state can be more flexibly adjusted to a smaller transmission power, thereby reducing collision with other closed small cells.
  • multiple The small cells in the closed state can share the same PCI, thereby releasing the PCI that is occupied in the open state, for example, in a specific area, for the physical cell identity allocation unit 104 to allocate to other cells requiring PCI.
  • the physical cell identity allocation unit 104 may be further configured to allocate the intra-cluster common physical cell identity of the target small cell cluster where the target small cell is located to the target small cell and be the target small cell when the target small cell is in the closed state.
  • Configuring a unique channel state indication reference signal (CSI-RS) in the cluster and/or configuring a Discovery Reference Signal (DRS) including a unique CSI-RS in the cluster for details, refer to 3GPP, Draft Report of 3GPP) TSG RAN WG1#77).
  • CSI-RS channel state indication reference signal
  • DRS Discovery Reference Signal
  • the intra-cluster general physical cell identifier indicates a physical cell identifier shared when all small cells in the small cell cluster are in a closed state, and more preferably, the intra-cluster common physical cell identifiers of different small cell clusters within a predetermined range are different.
  • the small cell cluster may be obtained by dividing a small cell in a region as a cluster by dividing the region, or by limiting the number of cells in the cluster and the average distance of the cells in the cluster, and the details are not detailed in the present disclosure. Describe to avoid blurring the focus.
  • the above-mentioned allocation of different CSI-RS/DRSs for small cells using universal PCI can assist small cell discovery, identification and measurement in the off state.
  • the different small-cell clusters described above adopt different general-purpose PCI methods to improve the recognition degree of the closed-cell small cells, that is, adopt PCI+CSI-RS/DRS. The way to distinguish between different small cells.
  • the number of physical cell identifiers is limited (504). As the number of small cells increases, physical cell identifiers need to be multiplexed to ensure effective allocation of physical cell identifiers and no conflicts between small cells. interference.
  • the allocation of the set of available physical cell identifiers within the cluster of each small cell cluster according to the physical cell identity multiplexing condition will be described below with reference to FIG.
  • the set of available physical cell identifiers in the cluster indicates a set of unique physical cell identifiers in the cluster that are available when all small cells in the small cell cluster are in an open state.
  • FIG. 2 is a block diagram showing another functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure.
  • apparatus 200 can include a grouping unit 202, a physical cell identity allocation unit 204, and an intra-cluster available physical cell identity set allocation unit 206.
  • the functional configuration of the grouping unit 202 and the physical cell identifier assigning unit 204 is the same as that of the grouping unit 102 and the physical cell identifier assigning unit 104 shown in FIG. 1 and will not be further described herein. Only a functional configuration example of the available physical cell identification set allocation unit 206 within the cluster will be described in detail below.
  • the intra-cluster available physical cell identity set allocation unit 206 can be configured to be small according to a predetermined The physical cell identification multiplexing condition between the cell clusters and the number of small cells in the small cell cluster allocates a set of available physical cell identifiers in the cluster for each small cell cluster.
  • the set of available physical cell identifiers in the cluster indicates a set of unique physical cell identifiers in the cluster that are available when all the small cells in the small cell cluster are in an open state, and the set of available physical cell identifiers in the cluster of the small cell cluster that does not meet the multiplexing condition There is no intersection between them.
  • the setting factors of the physical cell identification multiplexing condition between the small cell clusters include one of: (1) a cell search capability of the user equipment based on the small cell cluster edge; and (2) a coverage and user based on the macro cell. Cell search capability of the device.
  • FIG. 3 is a schematic diagram showing an example of multiplexing conditions of physical cell identification between small cell clusters according to an embodiment of the present disclosure.
  • the multiplexing condition is set based on the search capability of the edge user equipment, whether the different small cell clusters can multiplex the physical cell identifier may be determined according to the cell search range of the user equipment located at the edge of the small cell cluster. As shown in FIG.
  • the intra-cluster available physical cell identity set allocation unit 206 can be configured to determine its search capability according to the actual performance of the particular edge user device, and in another example, the available physical cells within the cluster The identity set allocation unit 206 can be configured to estimate its search capabilities based on the general performance or optimal performance of the user equipment.
  • FIG. 4 is a schematic diagram showing another example of multiplexing conditions of physical cell identification between small cell clusters according to an embodiment of the present disclosure.
  • the macro cell may be partitioned according to the coverage of the macro cell and the maximum cell search range of the user equipment, and the distance is located in the farthest area.
  • the cell cluster can multiplex the physical cell identity, wherein the radius and the number of partitions of the central partition shown in FIG. 4 are adjustable.
  • the small cell in the small cell cluster B may multiplex the physical cell identity used in the small cell cluster A, and the small cell cluster A and the small cell cluster B may not be multiplexed with the small cell cluster C.
  • Physical cell identity Specifically, a coloring method may be used to determine a small cell cluster in which PCI may be multiplexed, so that, for example, a small cell cluster located in the same colored area may multiplex PCI.
  • Table 2 below shows the set of available physical cell identifiers in the cluster of the small cell cluster A, the small cell cluster B, and the small cell cluster C shown in FIG. 4 by taking the above-described grouping method (3) and multiplexing condition (2) as an example.
  • Example. It can be seen that there is no intersection between the available PCI sets in the cluster of small cell clusters that do not meet the multiplexing condition.
  • the network condition in the small cell cluster or the predetermined area changes, for example, when a small cell cluster or a small cell is added/reduced, it is necessary to re-determine the available PCI set in the cluster and notify each small cell.
  • the physical cell identity assigning unit 204 may be further configured to determine each small cell cluster based on the intra-cluster common physical cell identity and the intra-cluster available physical cell identity set allocated for the small cell cluster based on the on/off state of the small cell The physical cell identity of the cell.
  • the physical cell identifier allocation unit 204 may be configured to set the physical cell identifier to the intra-cluster general physical cell identifier and the unique one in the closed-cell small cell set when the small cell transitions from the on state to the off state.
  • the channel state indication reference signal (CSI-RS) is used to support the cell identity and measurement mechanism of the small cell in the off state, as shown in Table 3 below.
  • the physical cell identity assigning unit 204 can be from the small network according to the current network status (for example, the number, state, location, PCI allocation status, etc. of the small cell in the small cell cluster).
  • the available physical cell identifier set in the cluster of the cell cluster selects a reasonable unique physical cell identifier in the cluster for the small cell.
  • the physical cell identifier allocation unit 204 may be further configured to, based on the predetermined grouping manner, the location of the small cell in the target small cell cluster or within the predetermined area, and the target small cell cluster for the target small cell to be turned on. Or determining a current physical cell identity allocation status in the predetermined area, determining a packet to which the physical cell identifier of the target small cell belongs, and randomly selecting an available physical cell identity allocation from the set of available physical cell identifiers in the cluster of the target small cell cluster according to the packet. Give the target small cell.
  • FIG. 5 illustrates a schematic diagram of an allocation state of physical cell identities of respective small cells within a small cell cluster, according to an embodiment of the present disclosure.
  • the physical cell identifier of the small cell in the closed state is the general physical cell identifier in the cluster of the cell cluster, and the small cell in the open state is assigned the unique physical cell identifier in the cluster.
  • FIG. 6 is a schematic diagram showing an allocation state of physical cell identifiers of respective small cells within a small cell cluster, according to an embodiment of the present disclosure.
  • the physical cell identity allocation of the small cell currently in the open state in the target small cell cluster is as shown in Table 4 below.
  • the allocation manner of the unique physical cell identifier in the cluster of the small cell 0 when the small cell 0 as the target small cell shown in FIG. 6 is switched from the off state to the on state will be described below.
  • the physical cell identity assignment unit 204 may be configured such that The unique physical cell identifier in the cluster of the target small cell is determined by minimizing the collision between the target small cell and the primary synchronization signal of the small cell in the target small cell in the target small cell or in the predetermined area.
  • the following processing steps may be used to determine the group to which the unique physical cell identifier in the cluster of the small cell 0 to be turned on belongs.
  • Step 1A Calculate the distance R of the small cell in the open state in the small cell cluster in which the small cell 0 is located or in the predetermined area to the small cell 0.
  • n denotes the number of regions divided within a small cell cluster or within a predetermined region (in the example of FIG. 6, n denotes the number of divided circles, here is 3)
  • d_i denotes a small cell 0 as a center The radius of the circle.
  • the values of n, d_0, d_1, ..., d_n may be preset experience values, or may be set according to specific network conditions, and the values of d_0, d_1, ..., d_n may be the same, or may also be different.
  • Step 3A Calculate the value of PCI-mod-3 of the small cell in the on state within the distance R (d_i ⁇ R ⁇ d_i + 1) and count.
  • the small cell 0 is mapped to the packet whose value of PCI_mod_3 is 2, so that collision between the small cell 0 and the PSS of other small cells can be avoided as much as possible.
  • the physical cell identity allocation unit 204 may be configured such that when the target small cell transitions from the off state to the on state Determining the unique physical cell in the cluster of the target small cell by minimizing the collision between the target small cell and the cell-specific frequency offset of the small cell in the target small cell in the target small cell or in the predetermined area logo.
  • the following processing steps may be used to determine the group to which the unique physical cell identifier in the cluster of the small cell 0 to be turned on belongs.
  • Step 1B Calculate the distance R from the small cell in the open state or in the predetermined area in the small cell cluster where the small cell 0 is located to the small cell 0.
  • n denotes the number of regions divided within a small cell cluster or within a predetermined region (in the example of FIG. 6, n denotes the number of divided circles, here is 3)
  • d_i denotes a small cell 0 as a center The radius of the circle.
  • the values of n, d_0, d_1, ..., d_n may be preset experience values, or may be set according to specific network conditions, and the values of d_0, d_1, ..., d_n may be the same, or may also be different.
  • Step 3B Calculate and count the value of PCI-mod-6 of the small cell in the on state within the distance R (d_i ⁇ R ⁇ d_i + 1).
  • small cell 0 is mapped to a packet with a value of 4 for PCI_mod_6 to avoid collisions between small cell 0 and cell-specific frequency offsets of other small cells.
  • the target small cell is switched from the off state to the on state.
  • the physical cell identity assigning unit 204 may be configured to cause a collision between the target small cell and the primary synchronization signal of the small cell in the target small cell cluster in the target small cell cluster or in the predetermined area, and the cell A unique physical cell identity within the cluster of the target small cell is determined in a manner that minimizes collisions between specific frequency offsets.
  • the following processing steps may be used to determine the group to which the unique physical cell identifier in the cluster of the small cell 0 to be turned on belongs.
  • Step 1C Calculate the distance R from the small cell in the open cell cluster or the small cell to the small cell 0 in the small cell cluster where the small cell 0 is located.
  • n denotes the number of regions divided within a small cell cluster or within a predetermined region (in the example of FIG. 6, n denotes the number of divided circles, here is 3)
  • d_i denotes a small cell 0 as a center The radius of the circle.
  • the values of n, d_0, d_1, ..., d_n may be preset experience values, or may be set according to specific network conditions, and the values of d_0, d_1, ..., d_n may be the same, or may also be different.
  • Step 3C Calculate the value of PCI-mod-3 of the small cell in the on state within the distance R (d_i ⁇ R ⁇ d_i + 1) and count.
  • Step 5C Compare the cell count based on the PCI-mod-6 value in the distance R (d_j ⁇ R ⁇ d_j+1). If there is a unique minimum value in the count, map the small cell to the PCI packet corresponding to the value. If the count does not have a unique minimum, proceed to step 6C.
  • Step 7C Calculate the value of PCI-mod-6 of the small cell in the on state within the distance R (d_i ⁇ R ⁇ d_i + 1) and count.
  • the small cell 0 is mapped to the packet having a value of 2 for PCI_mod_6.
  • the packet to which the physical cell identity of the small cell 0 belongs is determined based on the priority of avoiding the PSS collision being higher than the priority of avoiding the cell-specific frequency offset collision, but may also be based on avoiding the cell-specific frequency offset.
  • the priority of the collision conflict is higher than the priority of avoiding the PSS collision to determine the packet to which the physical cell identifier of the small cell 0 belongs.
  • Step 1D Calculate the distance R from the small cell in the open cell cluster or the small cell to the small cell 0 in the small cell cluster where the small cell 0 is located.
  • n denotes the number of regions divided within a small cell cluster or within a predetermined region (in the example of FIG. 6, n denotes the number of divided circles, here is 3)
  • d_i denotes a small cell 0 as a center The radius of the circle.
  • the values of n, d_0, d_1, ..., d_n may be preset experience values, or may be set according to specific network conditions, and the values of d_0, d_1, ..., d_n may be the same, or may also be different.
  • Step 3D Calculate and count the value of PCI-mod-6 of the small cell in the on state within the distance R (d_i ⁇ R ⁇ d_i + 1).
  • Step 5D Compare the cell count based on the PCI-mod-3 value in the distance R (d_j ⁇ R ⁇ d_j+1), and if the count has a unique minimum value, map the small cell to the PCI packet corresponding to the value. If the count does not have a unique minimum, proceed to step 6D.
  • Step 7D Calculate the value of PCI-mod-3 of the small cell in the on state within the distance R (d_i ⁇ R ⁇ d_i + 1) and count.
  • the available PCIs belonging to the PCI packet may be randomly selected from the available PCI sets of the small cell cluster to be allocated to the target small cell.
  • the following fast allocation method may also be adopted: that is, the PCI of the small cell is configured to be mapped to a specific when the small cell is deployed. The grouping, so that when the small cell is switched from the off state to the on state, the small cell can be directly allocated with a PCI available in a specific packet.
  • the physical cell identity allocation unit 204 may be further configured to determine, according to a manner that the physical cell identity of the neighboring small cell is mapped to a different packet, the packet to which the physical cell identity of each small cell belongs, and in the target small cell
  • the physical cell identifier available in the packet is selected from the group to which the physical cell identifier of the target small cell belongs, and is allocated to the target small cell as the unique physical cell identifier in the cluster.
  • FIG. 7 is a schematic diagram showing an example of physical cell identification packet mapping of respective small cells within a small cell cluster, according to an embodiment of the present disclosure.
  • PCIs are divided into three groups according to PCI-mod-3 values, and adjacent small cells are mapped to different PCI packets to avoid PSS collisions as much as possible.
  • FIG. 8 is a schematic diagram showing another example of physical cell identity group mapping of respective small cells within a small cell cluster, according to an embodiment of the present disclosure.
  • PCIs are divided into 6 groups according to PCI-mod-6 values, and adjacent small cells are mapped to different PCI packets to avoid cell-specific frequency offset collisions as much as possible.
  • FIG. 9 is a schematic diagram showing another example of physical cell identification packet mapping of respective small cells within a small cell cluster, according to an embodiment of the present disclosure.
  • PCI is divided into 6 groups according to PCI-mod-3 values and PCI-mod-6 values, and adjacent small cells are mapped to different PCI packets to avoid PSS collisions and Cell specific frequency offset conflicts.
  • the physical cell identity allocation unit 204 may be further configured to allocate the same PCI packet to the two small cells for the two adjacent small cells that are periodically turned on/off and whose on time does not overlap. Both cells are assigned the same PCI when they are both on.
  • the intra-cluster available physical cell identity set allocation unit 206 can be further configured to dynamically manage the available PCI sets within the cluster of the small cell cluster according to the on/off state of the small cell within the small cell cluster. Specifically, the intra-cluster available physical cell identifier set allocating unit 206 may delete the PCI allocated to the target small cell from the available PCI set in the cluster of the target small cell cluster when the target small cell is in the on state, and is in the target small cell. When the state is off, since the PCI of the target small cell is set to the intra-cluster general PCI at this time, the PCI used by the target small cell before the shutdown can be added to the available PCI set in the cluster of the target small cell cluster.
  • the PCI allocation in the small cell cluster can be dynamically managed according to the on/off state of the small cell, which reduces the cell planning burden and maintenance cost and has high flexibility.
  • the handover process is taken as an example to describe the impact of the PCI change before and after the small cell switch on the flow and the corresponding improvement scheme.
  • the base station should transmit to the user equipment that it corresponds to a specific GCI (global cell ID).
  • GCI global cell ID
  • the change information of the PCI of the cell of the global cell ID can be notified to the user equipment by, for example, RRC signaling.
  • FIG. 10 is a schematic diagram showing a signaling interaction flow for cell search and access in the case of dynamic allocation of physical cell identification
  • FIG. 11 is a diagram illustrating a flow according to an embodiment of the present disclosure.
  • the (mobility) signaling interaction flow for cell search and access shown in FIG. 10 and FIG. 11 is different from the prior art in that the target small cell is used in the on state and the off state.
  • the physical cell identifier is different, so it is necessary to notify the change of the physical cell identifier.
  • the user equipment so that the user equipment obtains the physical cell identifier of the open state of the target small cell before accessing the target small cell. Such differences are shown in shaded blocks in Figures 10 and 11.
  • the serving cell is a cell currently serving the user equipment, which may be a macro cell or a small cell, and the target small cell is a small cell to which the user equipment is to access.
  • the target small cell is a small cell to which the user equipment is to access.
  • the serving cell notifies the user equipment that needs to perform cell search to the current PCI of the neighboring small cell, the time when the neighboring small cell sends the cell discovery reference signal (DRS), and its configuration or proximity.
  • CSI-RS configuration information of the cell this is included in the "Measurement Control" shown in FIG. 10.
  • the user equipment reports to the serving cell after the above-mentioned PCI synchronization to the neighboring small cell and based on the specific CSI-RS/DRS of the neighboring small cell (this corresponds to the "measurement report" shown in FIG.
  • the serving cell is based on Determining whether the UE needs to access a target small cell in the neighboring small cell (this corresponds to the "access decision" in FIG. 10) from the measurement result of the cell search received by the user equipment, and determining that the target small cell needs to be accessed In the case, the serving cell sends an access request to the target small cell (this corresponds to the "access request" in FIG. 10).
  • the target small cell After receiving the access request, the target small cell transitions from the off state to the on state, and changes its physical cell identity from the intra-cluster general physical cell identity to the unique physical cell identity within the cluster (this corresponds to FIG. 10
  • the shaded block is "on").
  • the unique physical cell identifier within the cluster herein may be determined, for example, by the manner described in the above embodiments, which is selected from the set of available physical cell identifiers within the cluster of the small cell cluster, and is used differently from the target small cell closed state. General physical cell identity within the cluster.
  • the target small cell responds to the access request to inform the serving cell of the change in its physical cell identity (this corresponds to the "access request acknowledgement" in FIG. 10).
  • the serving cell sends an indication to the user equipment after receiving the notification from the target small cell (this corresponds to the "Access Command" in Figure 10). It should be understood that, in this example, the physical cell identifier of the open state of the target small cell is not included in the notification, and therefore the “access command” includes an indication indicating that the user equipment re-synchronizes with the target small cell, so that the user equipment The physical cell identifier of the open state is obtained from the target small cell.
  • the user equipment After receiving the indication from the serving cell, the user equipment re-synchronizes with the target small cell (this corresponds to the shaded block “downlink synchronization with the target small cell” in FIG. 10) to obtain the physical cell of the target small cell open state.
  • logo this corresponds to the shaded block “downlink synchronization with the target small cell” in FIG. 10.
  • the access request is from the serving cell in the example shown in FIG. 10, the present disclosure is not limited thereto, for example, under the framework of the C-RAN, the access request may also be determined by the baseband cloud and the target is notified. Community.
  • the signaling interaction process shown in FIG. 11 is similar to that of FIG. 10 except that the physical cell identifier of the open state of the target small cell is included in the “access request acknowledgement” from the target small cell, so that the user equipment does not need to be associated with the target.
  • the small cell re-synchronizes the downlink to obtain the physical cell identifier of the open state of the target small cell directly from the "access command" from the serving cell.
  • FIG. 12 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure.
  • the device is located on the side of the target small cell.
  • the apparatus 1200 can include an access determination unit 1202 and a control unit 1204.
  • the access determination unit 1202 can be configured to determine an access requirement of the user equipment. It should be understood that the access requirements herein may include, but are not limited to, for example, handover requirements, dual connectivity requirements, or carrier aggregation requirements across sites.
  • the control unit 1204 may be configured to convert the target small cell in which the device 1200 is located from the off state to the on state based on the access requirement of the user equipment, and re-assign the target small cell to a new physics different from the physical cell identifier used in the off state. Cell identification.
  • the physical cell identifier of the target small cell is a common physical cell identifier in the cluster that is shared when multiple small cells in the small cell cluster where the target small cell is in the closed state, wherein the predetermined range is
  • the intra-cluster common physical cell identifiers of the different small cell clusters are different, and when the target small cell is in the on state, the new physical cell identifier of the target small cell is selected from the clusters in the small cell cluster where the target small cell is located.
  • a unique physical cell identifier in a cluster of the physical cell identifier set wherein the set of available physical cell identifiers in the cluster indicates a set of unique physical cell identifiers in the cluster that are available when all small cells in the small cell cluster are in an open state.
  • the control unit 1204 can allocate the unique physical cell identifier within the cluster used by the on state, for example, by the manner described in the above embodiments.
  • the intra-cluster general physical cell identity and the set of available physical cell identifiers within the cluster may be pre-stored in the device 1200, or may be received from an external device, or may be received by the device 1200. It is determined by itself in the manner described, for example, in the above embodiments.
  • the device 1200 may further include a transceiver unit 1206.
  • the transceiving unit 1206 can be configured to receive an access request from a serving cell, and the access determining unit 1202 can determine an access requirement based on an access request from the serving cell.
  • the serving cell is a cell that is currently serving the user equipment, and may be a macro cell or a small cell, which is not limited in this disclosure.
  • the control unit 1204 may respond to the access request to send a notification to the serving cell by the transceiver unit 1206, the notification indicating a change in the physical cell identity of the target small cell, ie, the target small cell is off.
  • the physical cell identity is changed from the general physical cell identity in the cluster to the unique physical cell identity in the cluster selected from the set of available physical cell identifiers in the cluster. It should be understood that such an indication may be displayed or implicit.
  • the user equipment needs to perform downlink synchronization with the target small cell to acquire a new physical cell identity of the target small cell, which corresponds to, for example, the case shown in FIG.
  • the notification may also include the new physical cell identifier in the open state allocated by the control unit to the target small cell, so that the serving cell may directly obtain the target small cell from the received notification.
  • a new physical cell identity which corresponds to, for example, the situation shown in FIG.
  • FIG. 13 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure.
  • the device is located on the side of the serving cell.
  • the apparatus 1300 can include a determining unit 1302, a transceiving unit 1304, and an indicating unit 1306.
  • the determining unit 1302 may be configured to determine whether the user equipment needs to access from the serving cell to the target small cell in the neighboring small cell according to the measurement result of the discovery reference signal of the neighboring small cell by the user equipment served by the serving cell where the device 1300 is located.
  • the transceiving unit 1304 can be configured to, when the determining unit 1302 determines that it is necessary to access from the serving cell to the target small cell, send an access request to the target small cell and receive a response to the access request from the target small cell.
  • the indication unit 1306 can be configured to send an indication to the user equipment according to the received response, the indication comprising control information accessing the target small cell, such that the user equipment accesses the target according to the new physical cell identity of the target small cell Small cell.
  • the new physical cell identity is the target The newly allocated physical cell identity when the small cell transitions from the off state to the on state and is different from the physical cell identity used by the off state.
  • the physical cell identity used by the off state is a generic physical cell identity within the cluster
  • the new physical cell identity is a unique physical cell identity within the cluster selected from the set of available physical cell identifiers within the cluster.
  • the indication that the indication unit 1306 sends to the user equipment may include a resynchronization indication indicating that the user equipment re-synchronizes with the target small cell, so that the user equipment obtains its new physical cell identifier from the target small cell (this corresponds to, for example, a figure The situation shown in 10).
  • the indication may also include a new physical cell identifier of the target small cell, so that the user equipment can obtain the new physical cell identifier of the target small cell directly from the indication without re-synchronizing with the target small cell (this corresponds to, for example, The situation shown in Figure 11).
  • FIG. 14 is a block diagram showing a functional configuration example of a device on the user device side in a wireless communication system according to an embodiment of the present disclosure.
  • device 1400 can include a transceiving unit 1402 and a control unit 1404.
  • the transceiver unit 1402 can be configured to transmit a measurement result of the user equipment to the discovery reference signal of the neighboring small cell to the serving cell, and receive an access indication from the serving cell regarding access to the target small cell in the neighboring small cell.
  • the control unit 1404 can be configured to acquire a new physical cell identity of the target small cell based on the access indication to access the target small cell according to the new physical cell identity.
  • the new physical cell identifier is a newly allocated physical cell identifier when the target small cell is switched from the off state to the on state and is different from the physical cell identifier used in the off state.
  • the physical cell identity used by the off state is a generic physical cell identity within the cluster
  • the new physical cell identity is a unique physical cell identity within the cluster selected from the set of available physical cell identifiers within the cluster.
  • the access indication may include a resynchronization indication indicating that the user equipment re-synchronizes with the target small cell, and the control unit 1404 may perform downlink synchronization with the target small cell according to the resynchronization indication to obtain the target small cell.
  • the new physical cell is identified, and the user equipment is controlled to access the target small cell according to the new physical cell identity (this corresponds to, for example, the case shown in FIG. 10).
  • the access indication may also include a new physical cell identifier of the target small cell, so that the control unit 1404 may directly control the user equipment to access the target small cell according to the new physical cell identifier in the access indication, without being small with the target.
  • the cell re-synchronizes (this corresponds to, for example, the case shown in Figure 11).
  • the present disclosure also provides a method in a wireless communication system.
  • An example of a procedure of a method in a wireless communication system according to an embodiment of the present disclosure will be described below with reference to FIGS. 15 through 18.
  • FIG. 15 is a flowchart illustrating a process example of a method in a wireless communication system, according to an embodiment of the present disclosure. The method shown in FIG. 15 corresponds to the apparatus in the wireless communication system described above with reference to FIGS. 1 and 2.
  • the physical cell identifiers are grouped according to the value of the physical cell identity in a predetermined grouping manner.
  • the physical cell identity is dynamically assigned to each small cell in the small cell cluster based on the on/off state of each small cell in the small cell cluster, at least according to the packet of the physical cell identity.
  • the physical cell identifier in the closed state of each small cell is different from the physical cell identifier in the open state.
  • FIG. 16 is a flowchart illustrating a process example of a method in a wireless communication system, according to an embodiment of the present disclosure.
  • the method shown in FIG. 16 corresponds to the device in the wireless communication system described above with reference to FIG.
  • the method can be performed on the target small cell side.
  • the access requirement of the user equipment is determined.
  • the access requirements herein may include, but are not limited to, for example, handover requirements, dual connectivity requirements, or carrier aggregation requirements across sites.
  • the target small cell is switched from the off state to the on state based on the access requirement of the user equipment, and the target small cell is newly allocated a new physical cell identifier different from the physical cell identifier used in the closed state. .
  • FIG. 17 is a flowchart illustrating a process example of a method in a wireless communication system, according to an embodiment of the present disclosure.
  • the method shown in FIG. 17 corresponds to the device in the wireless communication system described above with reference to FIG.
  • the method can be performed on the serving cell side.
  • the determining step S1702 it is determined whether the user equipment needs to access from the serving cell to the target small cell in the neighboring small cell according to the measurement result of the discovery reference signal of the neighboring small cell by the user equipment served by the serving cell. .
  • the transmitting and receiving step S1704 it is determined that it is necessary to access from the serving cell to the target small In the case of a cell, an access request is sent to the target small cell and a response to the access request is received from the target small cell.
  • an indication is sent to the user equipment according to the received response, the indication including control information accessing the target small cell, so that the user equipment accesses according to the new physical cell identifier of the target small cell.
  • Target small cell The new physical cell identifier is a newly allocated physical cell identifier when the target small cell is switched from the off state to the on state and is different from the physical cell identifier used in the off state.
  • the indication may include a resynchronization indication indicating that the user equipment re-synchronizes with the target small cell (refer to, for example, FIG. 10), or the indication may also include a new physical cell identifier of the target small cell (refer to, for example, FIG. 11) .
  • FIG. 18 is a flowchart illustrating a process example of a method in a wireless communication system, according to an embodiment of the present disclosure.
  • the method shown in FIG. 18 corresponds to the device in the wireless communication system described above with reference to FIG. This method can be performed on the user equipment side.
  • the measurement result of the discovery reference signal of the neighboring small cell by the user equipment is sent to the serving cell, and the access to the target small cell in the neighboring small cell is received from the serving cell. Enter the instructions.
  • control step S1804 a new physical cell identity of the target small cell is acquired based on the access indication to access the target small cell according to the new physical cell identity.
  • the new physical cell identifier is a newly allocated physical cell identifier when the target small cell is switched from the off state to the on state and is different from the physical cell identifier used in the off state.
  • machine-executable instructions in the storage medium and the program product according to the embodiments of the present disclosure may also be configured to perform the method corresponding to the apparatus embodiment described above, and thus the content not described in detail herein may refer to the previous corresponding The description of the location will not be repeated here.
  • a storage medium for carrying the above-described program product including machine-executable instructions is also included in the disclosure of the present invention.
  • the storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.
  • a central processing unit (CPU) 1901 executes various processes in accordance with a program stored in a read only memory (ROM) 1902 or a program loaded from a storage portion 1908 to a random access memory (RAM) 1903.
  • ROM read only memory
  • RAM random access memory
  • data required when the CPU 1901 executes various processes and the like is also stored as needed.
  • the CPU 1901, the ROM 1902, and the RAM 1903 are connected to one another via a bus 1904.
  • Input/output interface 1905 is also coupled to bus 1904.
  • the following components are connected to the input/output interface 1905: an input portion 1906 including a keyboard, a mouse, etc.; an output portion 1907 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), and the like, and a speaker and the like;
  • the storage portion 1908 includes a hard disk or the like; and the communication portion 1909 includes a network interface card such as a LAN card, a modem, and the like.
  • the communication section 1909 performs communication processing via a network such as the Internet.
  • the drive 1910 is also connected to the input/output interface 1905 as needed.
  • a removable medium 1911 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory or the like is mounted on the drive 1910 as needed, so that the computer program read therefrom is installed into the storage portion 1908 as needed.
  • a program constituting the software is installed from a network such as the Internet or a storage medium such as the detachable medium 1911.
  • such a storage medium is not limited to the removable medium 1911 shown in FIG. 19 in which a program is stored and distributed separately from the device to provide a program to the user.
  • Examples of the detachable medium 1911 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disk read only memory (CD-ROM) and a digital versatile disk (DVD)), and a magneto-optical disk (including a mini disk (MD) (registered trademark) )) and semiconductor memory.
  • the storage medium may be the ROM 1902, the hard disk included in the storage portion 1908, and the like, in which programs are stored, and distributed to the user together with the device containing them.
  • the above-described devices 100 and 200 can be implemented as any type of server, such as a tower server, a rack server, and a blade server.
  • the server is generally disposed on the core network side and can be used to implement the physical small according to the present disclosure. Zone ID assignment function.
  • Devices 100 and 200 can also be control modules mounted on a server (such as an integrated circuit module including a single wafer, and a card or blade inserted into a slot of the blade server).
  • the base station of the above serving cell and the base station of the target small cell and the like may be implemented as any type of evolved Node B (eNB), such as a macro eNB and a small eNB.
  • the small eNB may be an eNB covering a cell smaller than the macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB.
  • the base station of the serving cell and the base station of the target small cell may be implemented as any other type of base station, such as a NodeB and a base transceiver station (BTS).
  • BTS base transceiver station
  • the function of allocating PCI can also be implemented by a macro base station or a small base station, and the structure when the base station implements the function of allocating PCI can refer to the description of this part.
  • the base station of the serving cell and the base station of the target small cell may include: a body (also referred to as a base station device) configured to control wireless communication; and one or more remote wireless heads (RRHs) disposed at a different place from the subject .
  • the above-mentioned main body for controlling wireless communication may also be a processing device of a baseband cloud, such as a server, with the development of C-RAN (Centralized, Cooperative, Cloud RAN).
  • C-RAN Centralized, Cooperative, Cloud RAN
  • various types of terminals which will be described below, can operate as a base station by performing base station functions temporarily or semi-persistently.
  • the above user equipment may be implemented as a mobile terminal (such as a smart phone, a tablet personal computer (PC), a notebook PC, a smart wearable device, a portable game terminal, a portable/encrypted dog type mobile router, and a digital camera device) or an in-vehicle terminal. (such as car navigation equipment).
  • the above user equipment may also be implemented as a terminal (also referred to as a machine type communication (MTC) terminal) that performs machine-to-machine (M2M) communication.
  • MTC machine type communication
  • M2M machine-to-machine
  • the above user equipment may be a wireless communication module (such as an integrated circuit module including a single wafer) installed on each of the above terminals.
  • FIG. 20 is a block diagram showing an example of a schematic configuration of a server 2000 to which the technology of the present disclosure can be applied.
  • the server 2000 includes a processor 2001, a memory 2002, a storage device 2003, a network interface 2004, and a bus 2006.
  • the processor 2001 can be, for example, a central processing unit (CPU) or a digital signal processor (DSP) and controls the functions of the server 2000.
  • the memory 2002 includes random access memory (RAM) and read only memory (ROM), and stores data and programs executed by the processor 2001.
  • the storage device 2003 may include a storage medium such as a semiconductor memory and a hard disk.
  • the network interface 2004 is for connecting the server 2000 to the wired communication network 2005.
  • the wired communication network 2005 may be a core network such as an Evolved Packet Core Network (EPC) or a packet data network (PDN) such as the Internet.
  • EPC Evolved Packet Core Network
  • PDN packet data network
  • the bus 2006 connects the processor 2001, the memory 2002, the storage device 2003, and the network interface 2004 to each other.
  • the bus 2006 may include two or more buses (such as a high speed bus and a low speed bus) each having a different speed.
  • the packet unit, the physical cell identity allocation unit, and the intra-cluster available physical cell identity set allocation unit described by using FIGS. 1 and 2 can be implemented by the processor 2001.
  • the eNB 2100 includes one or more antennas 2110 and base station devices 2120.
  • the base station device 2120 and each antenna 2110 may be connected to each other via an RF cable.
  • Each of the antennas 2110 includes a single or multiple antenna elements, such as multiple antenna elements included in a multiple input multiple output (MIMO) antenna, and is used by the base station device 2120 to transmit and receive wireless signals.
  • the eNB 2100 may include a plurality of antennas 2110.
  • multiple antennas 2110 can be compatible with multiple frequency bands used by eNB 2100.
  • FIG. 21 illustrates an example in which the eNB 2100 includes a plurality of antennas 2110, the eNB 2100 may also include a single antenna 2110.
  • the base station device 2120 includes a controller 2121, a memory 2122, a network interface 2123, and a wireless communication interface 2125.
  • the controller 2121 can be, for example, a CPU or a DSP, and operates various functions of higher layers of the base station device 2120. For example, the controller 2121 generates a data packet based on data in the signal processed by the wireless communication interface 2125 and delivers the generated packet via the network interface 2123. The controller 2121 can bundle data from a plurality of baseband processors to generate bundled packets and deliver the generated bundled packets. The controller 2121 may have a logical function of performing control such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby eNBs or core network nodes.
  • the memory 2122 includes a RAM and a ROM, and stores programs executed by the controller 2121 and various types of control data such as a terminal list, transmission power data, and scheduling data.
  • Network interface 2123 is a communication interface for connecting base station device 2120 to core network 2124.
  • the controller 2121 can communicate with the core network node or another eNB via the network interface 2123 Communicate.
  • the eNB 2100 and the core network node or other eNBs may be connected to each other through a logical interface such as an S1 interface and an X2 interface.
  • Network interface 2123 can also be a wired communication interface or a wireless communication interface for wireless backhaul lines. If the network interface 2123 is a wireless communication interface, the network interface 2123 can use a higher frequency band for wireless communication than the frequency band used by the wireless communication interface 2125.
  • the wireless communication interface 2125 supports any cellular communication schemes, such as Long Term Evolution (LTE) and LTE-Advanced, and provides wireless connectivity to terminals located in cells of the eNB 2100 via the antenna 2110.
  • Wireless communication interface 825 can typically include, for example, a baseband (BB) processor 2126 and RF circuitry 2127.
  • the BB processor 2126 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs layers (eg, L1, Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP)) Various types of signal processing.
  • BB processor 2126 may have some or all of the above described logic functions.
  • the BB processor 2126 may be a memory that stores a communication control program, or a module that includes a processor and associated circuitry configured to execute the program.
  • the update program can cause the function of the BB processor 2126 to change.
  • the module can be a card or blade that is inserted into the slot of the base station device 2120. Alternatively, the module can also be a chip mounted on a card or blade.
  • the RF circuit 2127 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 2110.
  • the wireless communication interface 2125 can include a plurality of BB processors 2126.
  • multiple BB processors 2126 may be compatible with multiple frequency bands used by eNB 2100.
  • the wireless communication interface 2125 can include a plurality of RF circuits 2127.
  • multiple RF circuits 2127 can be compatible with multiple antenna elements.
  • FIG. 21 illustrates an example in which the wireless communication interface 2125 includes a plurality of BB processors 2126 and a plurality of RF circuits 2127, the wireless communication interface 2125 may also include a single BB processor 2126 or a single RF circuit 2127.
  • FIG. 22 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied.
  • the eNB 2230 includes one or more antennas 2240, base station devices 2250, and RRHs 2260.
  • the RRH 2260 and each antenna 2240 may be connected to each other via an RF cable.
  • the base station device 2250 and the RRH 2260 may be connected to each other via a high speed line such as a fiber optic cable.
  • Each of the antennas 2240 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for the RRH 2260 to transmit and receive wireless signals.
  • the eNB 2230 can include multiple antennas 2240.
  • multiple antennas 2240 can be compatible with multiple frequency bands used by eNB 2230.
  • FIG. 22 shows an eNB 2230 An example of multiple antennas 2240 is included, but eNB 2230 may also include a single antenna 2240.
  • the base station device 2250 includes a controller 2251, a memory 2252, a network interface 2253, a wireless communication interface 2255, and a connection interface 2257.
  • the controller 2251, the memory 2252, and the network interface 2253 are the same as the controller 2121, the memory 2122, and the network interface 2123 described with reference to FIG.
  • the wireless communication interface 2255 supports any cellular communication scheme (such as LTE and LTE-Advanced) and provides wireless communication to terminals located in sectors corresponding to the RRH 2260 via the RRH 2260 and the antenna 2240.
  • Wireless communication interface 2255 can typically include, for example, BB processor 2256.
  • the BB processor 2256 is identical to the BB processor 2126 described with reference to FIG. 21 except that the BB processor 2256 is connected to the RF circuit 2264 of the RRH 2260 via the connection interface 2257.
  • the wireless communication interface 2255 can include a plurality of BB processors 2256.
  • multiple BB processors 2256 can be compatible with multiple frequency bands used by eNB 2230.
  • FIG. 22 illustrates an example in which the wireless communication interface 2255 includes a plurality of BB processors 2256, the wireless communication interface 2255 may also include a single BB processor 2256.
  • connection interface 2257 is an interface for connecting the base station device 2250 (wireless communication interface 2255) to the RRH 2260.
  • the connection interface 2257 may also be a communication module for connecting the base station device 2250 (wireless communication interface 2255) to the communication in the above-described high speed line of the RRH 2260.
  • the RRH 2260 includes a connection interface 2261 and a wireless communication interface 2263.
  • connection interface 2261 is an interface for connecting the RRH 2260 (wireless communication interface 2263) to the base station device 2250.
  • the connection interface 2261 may also be a communication module for communication in the above high speed line.
  • the wireless communication interface 2263 transmits and receives wireless signals via the antenna 2240.
  • Wireless communication interface 2263 may typically include, for example, RF circuitry 2264.
  • the RF circuit 2264 can include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 2240.
  • the wireless communication interface 2263 can include a plurality of RF circuits 2264.
  • multiple RF circuits 2264 can support multiple antenna elements.
  • FIG. 22 illustrates an example in which the wireless communication interface 2263 includes a plurality of RF circuits 2264, the wireless communication interface 2263 may also include a single RF circuit 2264.
  • the transceiving unit 1206 and the transceiving unit 1304 described by using FIGS. 12 and 13 may be provided by the wireless communication interface 2125 and the wireless communication interface 2255 and/or the wireless communication interface. 2263 implementation. At least a portion of the functionality can also be implemented by controller 2121 and controller 2251.
  • a plurality of functions included in one unit in the above embodiment may be implemented by separate devices.
  • a plurality of functions implemented by a plurality of units in the above embodiments may be implemented by separate devices, respectively.
  • one of the above functions may be implemented by a plurality of units. Needless to say, such a configuration is included in the technical scope of the present disclosure.
  • the steps described in the flowcharts include not only processes performed in time series in the stated order, but also processes performed in parallel or individually rather than necessarily in time series. Further, even in the step of processing in time series, it is needless to say that the order can be appropriately changed.

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Abstract

公开了一种无线通信系统中的装置和方法，该装置包括接入确定单元，被配置成确定用户设备的接入需求；以及控制单元，被配置成基于用户设备的接入需求，将该装置所在的目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。根据本公开的实施例，可以根据小小区的开启/关闭状态而动态地分配物理小区标识，同时减小了小区规划负担和维护成本且具有更高的灵活性。

Description

无线通信系统中的装置和方法 技术领域
本公开涉及无线通信技术领域，更具体地，涉及在小小区部署以及开启/关闭场景下对物理小区标识进行动态管理的无线通信系统中的装置和方法以及该情况下的小区搜索和接入过程。
背景技术
物理小区标识(Physical cell ID，PCI)可在物理层标识演进节点B(eNB)/小小区。由于LTE-A系统中，物理小区标识与加扰序列生成、小区搜索、资源映射等机制密切相关，因此物理小区标识在物理层中发挥着重要作用。
物理小区标识是用于物理信道中加扰序列生成的重要决定信息，尤其对降低控制信道和广播信道的干扰发挥着关键作用。同时，物理小区标识与主同步信号(Primary Synchronization Signal，PSS)/辅同步信号SSS(Secondary Synchronization Signal，SSS)序列、小区特定参考信号(Cell-specific Reference Signal，CRS)等相对应，还与小区特定参考信号及控制信道资源映射的频率偏移值密切相关。因此，为了避免相邻小区间的干扰，特别是同频小区之间的干扰，需要对504个物理小区标识进行合理的分配。
在现有技术中，为了合理分配物理小区标识，主要采用规划方法在小区部署之初为小区分配固定的物理小区标识，如需改动，需人为进行配置。而在小小区(small cell)超密集部署的场景下，小小区间干扰将更为严重，因此现有技术的方法将带来极大的小区规划负担和维护成本，同时缺乏灵活性，难以适应例如即插即用等的自动配置机制，也难以满足更为灵活的无规划的小小区部署场景要求。
发明内容
在下文中给出了关于本公开的简要概述，以便提供关于本公开的某些方面的基本理解。但是，应当理解，这个概述并不是关于本公开的穷举性 概述。它并不是意图用来确定本公开的关键性部分或重要部分，也不是意图用来限定本公开的范围。其目的仅仅是以简化的形式给出关于本公开的某些概念，以此作为稍后给出的更详细描述的前序。
鉴于以上问题，本公开的目的是提供一种用于在小小区部署及开启/关闭场景下动态地管理物理小区标识的无线通信系统中的装置和方法，其克服了现有技术中的问题，减小了小区规划负担和维护成本并且提高了灵活性。
根据本公开的一方面，提供了一种无线通信系统中的装置，该装置包括：接入确定单元，被配置成确定用户设备的接入需求；以及控制单元，被配置成基于用户设备的接入需求，将该装置所在的目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
根据本公开的另一方面，还提供了一种无线通信系统中的装置，该装置包括：判定单元，被配置成根据装置所在的服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定用户设备是否需要从服务小区接入到邻近小小区中的目标小小区；收发单元，被配置成在判定单元判定需要从服务小区接入到目标小小区的情况下，向目标小小区发送接入请求以及从目标小小区接收对接入请求的响应；以及指示单元，被配置成根据响应而向用户设备发送指示，该指示包含接入到目标小小区的控制信息，以使得用户设备根据目标小小区的新物理小区标识而接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种无线通信系统中的用户设备侧的装置，该装置包括：收发单元，被配置成将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从服务小区接收关于接入到邻近小小区中的目标小小区的接入指示，服务小区是当前服务于用户设备的小区；以及控制单元，被配置成基于接入指示获取目标小小区的新物理小区标识，以根据新物理小区标识控制用户设备接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种无线通信系统中的装置，该装置包括：分组单元，被配置成以预定分组方式根据物理小区标识的值对物 理小区标识进行分组；以及物理小区标识分配单元，被配置成至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识。优选地，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种无线通信系统中的方法，该方法包括：接入确定步骤，用于确定用户设备的接入需求；以及控制步骤，用于基于用户设备的接入需求，将目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
根据本公开的另一方面，还提供了一种无线通信系统中的方法，该方法包括：判定步骤，用于根据服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定用户设备是否需要从服务小区接入到邻近小小区中的目标小小区；收发步骤，用于在判定需要从服务小区接入到目标小小区的情况下，向目标小小区发送接入请求以及从目标小小区接收对接入请求的响应；以及指示步骤，用于根据响应而向用户设备发送指示，该指示包含接入到目标小小区的控制信息，以使得用户设备根据目标小小区的新物理小区标识而接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种无线通信系统中的方法，该方法包括：收发步骤，用于将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从服务小区接收关于接入到邻近小小区中的目标小小区的接入指示，服务小区是当前服务于用户设备的小区；以及控制步骤，用于基于接入指示获取目标小小区的新物理小区标识，以根据新物理小区标识控制用户设备接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种无线通信系统中的方法，该方法包括：分组步骤，用于以预定分组方式根据物理小区标识的值对物理小区标识进行分组；以及物理小区标识分配步骤，用于至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识。优选地，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种存储介质，该存储介质包括机器可读的程序代码，当在信息处理设备上执行程序代码时，该程序代码使得信息处理设备执行包括以下步骤的方法：接入确定步骤，用于确定用户设备的接入需求；以及控制步骤，用于基于用户设备的接入需求，将目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
根据本公开的另一方面，还提供了一种存储介质，该存储介质包括机器可读的程序代码，当在信息处理设备上执行程序代码时，该程序代码使得信息处理设备执行包括以下步骤的方法：判定步骤，用于根据服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定用户设备是否需要从服务小区接入到邻近小小区中的目标小小区；收发步骤，用于在判定需要从服务小区接入到目标小小区的情况下，向目标小小区发送接入请求以及从目标小小区接收对接入请求的响应；以及指示步骤，用于根据响应而向用户设备发送指示，该指示包含接入到目标小小区的控制信息，以使得用户设备根据目标小小区的新物理小区标识而接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种存储介质，该存储介质包括机器可读的程序代码，当在信息处理设备上执行程序代码时，该程序代码使得信息处理设备执行包括以下步骤的方法：收发步骤，用于将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从服务小区接收关于接入到邻近小小区中的目标小小区的接入指示，服务小区是当前服务于用户设备的小区；以及控制步骤，用于基于接入指示获取目标小小区的新物理小区标识，以根据新物理小区标识控制用户设备接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种存储介质，该存储介质包括机器可读的程序代码，当在信息处理设备上执行程序代码时，该程序代码使得信息处理设备执行包括以下步骤的方法：分组步骤，用于以预定分组方式根据物理小区标识的值对物理小区标识进行分组；以及物理小区标识分配步骤，用于至少根据物理小区标识的分组，基于小小区簇内的各个小小 区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识。优选地，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种程序产品，该程序产品包括机器可执行的指令，当在信息处理设备上执行指令时，该指令使得信息处理设备执行包括以下步骤的方法：接入确定步骤，用于确定用户设备的接入需求；以及控制步骤，用于基于用户设备的接入需求，将目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
根据本公开的另一方面，还提供了一种程序产品，该程序产品包括机器可执行的指令，当在信息处理设备上执行指令时，该指令使得信息处理设备执行包括以下步骤的方法：判定步骤，用于根据服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定用户设备是否需要从服务小区接入到邻近小小区中的目标小小区；收发步骤，用于在判定需要从服务小区接入到目标小小区的情况下，向目标小小区发送接入请求以及从目标小小区接收对接入请求的响应；以及指示步骤，用于根据响应而向用户设备发送指示，该指示包含接入到目标小小区的控制信息，以使得用户设备根据目标小小区的新物理小区标识而接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种程序产品，该程序产品包括机器可执行的指令，当在信息处理设备上执行指令时，该指令使得信息处理设备执行包括以下步骤的方法：收发步骤，用于将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从服务小区接收关于接入到邻近小小区中的目标小小区的接入指示，服务小区是当前服务于用户设备的小区；以及控制步骤，用于基于接入指示获取目标小小区的新物理小区标识，以根据新物理小区标识控制用户设备接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种程序产品，该程序产品包括机器可执行的指令，当在信息处理设备上执行指令时，该指令使得信息处理设备执行包括以下步骤的方法：分组步骤，用于以预定分组方式根据物理小区标识的值对物理小区标识进行分组；以及物理小区标识分配步骤，用 于至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识。优选地，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种电子设备，该电子设备位于无线通信系统中并且包括被配置为执行包括以下步骤的方法的电路，所述电路可实现为一个或多个处理器：接入确定步骤，用于确定用户设备的接入需求；以及控制步骤，用于基于用户设备的接入需求，将目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
根据本公开的另一方面，还提供了一种电子设备，该电子设备位于无线通信系统中并且包括被配置为执行包括以下步骤的方法的电路，所述电路可实现为一个或多个处理器：判定步骤，用于根据服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定用户设备是否需要从服务小区接入到邻近小小区中的目标小小区；收发步骤，用于在判定需要从服务小区接入到目标小小区的情况下，向目标小小区发送接入请求以及从目标小小区接收对接入请求的响应；以及指示步骤，用于根据响应而向用户设备发送指示，该指示包含接入到目标小小区的控制信息，以使得用户设备根据目标小小区的新物理小区标识而接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种电子设备，该电子设备位于无线通信系统中并且包括被配置为执行包括以下步骤的方法的电路，所述电路可实现为一个或多个处理器：收发步骤，用于将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从服务小区接收关于接入到邻近小小区中的目标小小区的接入指示，服务小区是当前服务于用户设备的小区；以及控制步骤，用于基于接入指示获取目标小小区的新物理小区标识，以根据新物理小区标识控制用户设备接入到目标小小区。优选地，目标小小区的新物理小区标识是目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
根据本公开的另一方面，还提供了一种电子设备，该电子设备位于无线通信系统中并且包括被配置为执行包括以下步骤的方法的电路，所述电路可实现为一个或多个处理器：分组步骤，用于以预定分组方式根据物理 小区标识的值对物理小区标识进行分组；以及物理小区标识分配步骤，用于至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识。优选地，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
在下面的说明书部分中给出本公开实施例的其他方面，其中，详细说明用于充分地公开本公开实施例的优选实施例，而不对其施加限定。
附图说明
本公开可以通过参考下文中结合附图所给出的详细描述而得到更好的理解，其中在所有附图中使用了相同或相似的附图标记来表示相同或者相似的部件。所述附图连同下面的详细说明一起包含在本说明书中并形成说明书的一部分，用来进一步举例说明本公开的优选实施例和解释本公开的原理和优点。其中：
图1是示出根据本公开的实施例的无线通信系统中的装置的功能配置示例的框图；
图2是示出根据本公开的实施例的无线通信系统中的装置的另一功能配置示例的框图；
图3是示出根据本公开的实施例的小小区簇间的物理小区标识的复用条件的示例的示意图；
图4是示出根据本公开的实施例的小小区簇间的物理小区标识的复用条件的另一示例的示意图；
图5是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识的分配状态的示意图；
图6是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识的分配状态的示意图；
图7是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识分组映射的示例的示意图；
图8是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识分组映射的另一示例的示意图；
图9是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识分组映射的另一示例的示意图；
图10是示出根据本公开的实施例的在物理小区标识的动态分配的情况下用于小区搜索和接入的信令交互流程的示意图；
图11是示出根据本公开的实施例的在物理小区标识的动态分配的情况下用于小区搜索和接入的另一信令交互流程的示意图；
图12是示出根据本公开的实施例的无线通信系统中的装置的功能配置示例的框图；
图13是示出根据本公开的实施例的无线通信系统中的装置的功能配置示例的框图；
图14是示出根据本公开的实施例的无线通信系统中的用户设备侧的装置的功能配置示例的框图；
图15是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图；
图16是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图；
图17是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图；
图18是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图；
图19是作为本公开的实施例中可采用的信息处理设备的个人计算机的示例结构的框图；
图20是示出是示出可以应用本公开的技术的服务器的示意性配置的示例的框图；
图21是示出可以应用本公开的技术的演进型节点B(eNB)的示意性配置的第一示例的框图；以及
图22示出可以应用本公开的技术的eNB的示意性配置的第二示例的框图。
具体实施方式
在下文中将结合附图对本公开的示范性实施例进行描述。为了清楚和简明起见，在说明书中并未描述实际实施方式的所有特征。然而，应该了解，在开发任何这种实际实施例的过程中必须做出很多特定于实施方式的决定，以便实现开发人员的具体目标，例如，符合与系统及业务相关的那些限制条件，并且这些限制条件可能会随着实施方式的不同而有所改变。此外，还应该了解，虽然开发工作有可能是非常复杂和费时的，但对得益于本公开内容的本领域技术人员来说，这种开发工作仅仅是例行的任务。
在此，还需要说明的一点是，为了避免因不必要的细节而模糊了本公开，在附图中仅仅示出了与根据本公开的方案密切相关的设备结构和/或处理步骤，而省略了与本公开关系不大的其他细节。
接下来，将参照图1至图19详细描述本公开的优选实施例。
首先，将参照图1描述根据本公开的实施例的无线通信系统中的装置的功能配置示例。图1是示出根据本公开的实施例的无线通信系统中的装置的功能配置示例的框图。
如图1所示，装置100可包括分组单元102和物理小区标识分配单元104。
分组单元102可被配置成以预定分组方式根据物理小区标识的值对物理小区标识进行分组。
作为具体的示例，预定分组方式可选自以下之一：(1)基于物理小区标识的值与3的模运算(PCI-mod-3)的结果；(2)基于物理小区标识的值与6的模运算(PCI-mod-6)的结果；以及(3)基于物理小区标识的值与3的模运算的结果和物理小区标识的值与6的模运算的结果两者。
以下表1示出了根据分组方式(3)的分组情况的示例。其中，将所有PCI或者例如特定管理区域使用的PCI分为6组，其中每组包含的PCI模3以及模6的值符合表中所示的数值。本领域技术人员应可了解，还可以根据分组方式(1)即仅根据模3的值将待分组的PCI划分到3个PCI分组中，例如将模3值为0、1、2的PCI分别划分到三个分组中；此外，也可以根据分组方式(2)即仅根据模6的值将待分组的PCI划分到6个PCI分组中，本公开不再赘述。
表1
PCI分组 1 2 3 4 5 6
PCI-mod-3值 0 0 1 1 2 2
PCI-mod-6值 0 3 1 4 2 5
物理小区标识分配单元104可被配置成至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识，其中，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。换言之，物理小区标识分配单元104将在小小区工作状态变化例如从开启状态转换为关闭状态的情况下重新为该小小区分配PCI。
应指出，在本公开中所使用的表述“开启状态”有时也称为激活状态或工作状态等，表述“关闭状态”有时也称为去激活状态或休眠状态等，它们是同义的。在本公开的以下描述中，将使用表述“开启状态”和“关闭状态”进行描述。此外，应理解，在本公开中，开启状态和关闭状态的主要区别在于关闭状态的小小区不再为用户设备提供数据传输服务。
此外，还应指出，本公开中涉及到工作状态变化通常讨论的是小小区，这是因为发明人做出本发明创意时通常只有小小区会发生工作状态的转换。然而，随着技术的发展，在未来的无线通信系统中，如果宏小区也会发生工作状态变化(即，在开启状态与关闭状态之间转换)或者不再需要具体区分宏小区和小小区的概念，则本发明的方案将适用于各种需要分配有限的PCI的小区中而不仅仅限于小小区。
在本公开的一个示例中，关闭状态下的小小区之间可以宽松地复用有限的PCI。具体地，开启状态的小区需要为其覆盖范围内的用户设备提供数据传输服务，并保证传输质量，因此通常需要较严格地限制开启状态的小区之间的PCI复用，例如禁止相邻的小区使用相同的PCI或者禁止彼此不相邻却共有一个相同的邻小区的小区使用相同的PCI，以免造成同步信号和/或参考信号冲突、混淆或干扰等问题。然而，在本公开中，关闭状态下的小小区不为用户设备提供数据传输服务，因此在较宽松的条件下小小区之间复用PCI并不会造成严重的影响。而且，在一个改进的示例中，关闭状态下小小区的同步信号/参考信号发射功率可以更有弹性地调节为较小的发射功率，从而减小与其他关闭的小小区的冲突。由此，多个 关闭状态下的小小区可以共用相同的PCI，从而释放其在开启状态下占用的例如特定区域内唯一的PCI，以供物理小区标识分配单元104分配给其他需要PCI的小区。
优选地，物理小区标识分配单元104可进一步被配置成在目标小小区处于关闭状态时，将目标小小区所在的目标小小区簇的簇内通用物理小区标识分配给目标小小区并且为目标小小区配置簇内唯一的信道状态指示参考信号(CSI-RS)以及/或者配置包含簇内唯一的CSI-RS的发现参考信号(Discovery Reference Signal,DRS)(DRS具体内容可参考3GPP,Draft Report of 3GPP TSG RAN WG1#77)。簇内通用物理小区标识表示小小区簇内的所有小小区处于关闭状态时共享的物理小区标识，并且更优选地，预定范围内不同小小区簇的簇内通用物理小区标识不同。其中，小小区簇可以是通过划分区域的方式使得一个区域内的小小区作为一簇而得到的，或者通过限制簇内小区个数、簇内小区平均距离等方式得到的，本公开中不作详细描述以免模糊重点。上述的为使用通用PCI的小小区分配不同的CSI-RS/DRS可以辅助对关闭状态的小小区发现、识别以及测量。由于CSI-RS以及DRS的图样(Pattern)也是有限的，因此通过上述的不同小小区簇采用不同的通用PCI的方式可以提高关闭状态小小区的识别度，即，采用PCI+CSI-RS/DRS的方式区分不同小小区。
应理解，物理小区标识的数量是有限的(504个)，随着小小区数量的增加，需要对物理小区标识进行复用以保证物理小区标识的有效分配并且各个小小区之间不会产生冲突干扰。以下将结合图2描述根据物理小区标识复用条件的各个小小区簇的簇内可用物理小区标识集合的分配。这里的簇内可用物理小区标识集合表示小小区簇内的所有小小区处于开启状态时可用的簇内唯一物理小区标识的集合。
接下来，将参照图2描述根据本公开的实施例的无线通信系统中的装置的另一功能配置示例。图2是示出根据本公开的实施例的无线通信系统中的装置的另一功能配置示例的框图。
如图2所示，装置200可包括分组单元202、物理小区标识分配单元204和簇内可用物理小区标识集合分配单元206。其中，分组单元202和物理小区标识分配单元204的功能配置与图1所示的分组单元102和物理小区标识分配单元104的功能配置相同，在此不再赘述。以下将仅详细描述簇内可用物理小区标识集合分配单元206的功能配置示例。
簇内可用物理小区标识集合分配单元206可被配置成根据预定的小 小区簇间的物理小区标识复用条件和小小区簇中的小小区数量，为各个小小区簇分配簇内可用物理小区标识集合。簇内可用物理小区标识集合表示小小区簇内的所有小小区处于开启状态时可用的簇内唯一物理小区标识的集合，并且不符合复用条件的小小区簇的簇内可用物理小区标识集合之间没有交集。
优选地，小小区簇间的物理小区标识复用条件的设置因素包括以下之一：(1)基于小小区簇边缘的用户设备的小区搜索能力；以及(2)基于宏小区的覆盖范围和用户设备的小区搜索能力。
图3是示出根据本公开的实施例的小小区簇间的物理小区标识的复用条件的示例的示意图。在基于边缘用户设备的搜索能力来设置复用条件的情况下，可根据位于小小区簇边缘的用户设备的小区搜索范围来确定不同的小小区簇是否可以复用物理小区标识。如图3所示，例如，由于小小区簇1和小小区簇2相互在其边缘用户设备的搜索范围之外，即使两簇各自包含的最接近的两个小小区使用了相同的物理小区标识，该两个小小区的用户设备也不会受到对方小小区的干扰，因此小小区簇1和小小区簇2可以复用物理小区标识。其中，在本公开的一个示例中，簇内可用物理小区标识集合分配单元206可被配置成根据具体的边缘用户设备的实际性能来判断其搜索能力，在另一个示例中，簇内可用物理小区标识集合分配单元206可被配置成根据用户设备的一般性能或者最佳性能估计其搜索能力。
图4是示出根据本公开的实施例的小小区簇间的物理小区标识的复用条件的另一示例的示意图。如图4所示，在基于宏小区分区来设置复用条件的情况下，简化地，可以根据宏小区覆盖范围和用户设备的最大小区搜索范围对宏小区进行分区，位于相距最远区域的小小区簇可复用物理小区标识，其中，图4所示的中心分区的半径和分区数是可调节的。例如，如图4所示，小小区簇B中的小小区可复用小小区簇A中所使用的物理小区标识，并且小小区簇A和小小区簇B不可以与小小区簇C复用物理小区标识。具体的可以采用着色法来确定可以复用PCI的小小区簇，从而例如位于相同着色区域内的小小区簇可以复用PCI。
以下表2以上述分组方式(3)以及复用条件(2)为例，示出了图4所示的小小区簇A、小小区簇B和小小区簇C的簇内可用物理小区标识集合的示例。可以看出，不符合复用条件的小小区簇的簇内可用PCI集合之间没有交集。
表2
Figure PCTCN2015088001-appb-000001
优选地，当小小区簇或预定区域内的网络状况发生变化时，例如，新增/减少了小小区簇或小小区时，需要重新确定簇内可用PCI集合并且通知各个小小区。
物理小区标识分配单元204可进一步被配置成根据为小小区簇分配的簇内通用物理小区标识和簇内可用物理小区标识集合，基于小小区的开启/关闭状态而确定小小区簇内的各个小小区的物理小区标识。
具体地，物理小区标识分配单元204可被配置成在小小区从开启状态转换为关闭状态时，将其物理小区标识设置为簇内通用物理小区标识，并且配置关闭状态的小小区集合内的唯一信道状态指示参考信号(CSI-RS)以支持关闭状态的小小区的小区标识和测量机制，如以下表3所示。
表3
Figure PCTCN2015088001-appb-000002
而在小小区从关闭状态转换为开启状态时，物理小区标识分配单元204可根据当前网络状况(例如，小小区簇内的小小区的数量、状态、位置、PCI分配状况等)而从该小小区簇的簇内可用物理小区标识集合中为该小小区选择合理的簇内唯一物理小区标识。
具体地，物理小区标识分配单元204可进一步被配置成对于待开启的目标小小区，基于预定分组方式、目标小小区簇内或预定区域内处于开启状态的小小区的位置以及目标小小小区簇或预定区域内的当前物理小区标识分配状态，确定目标小小区的物理小区标识所属的分组，并且根据该分组从目标小小区簇的簇内可用物理小区标识集合中随机选择可用的物理小区标识分配给目标小小区。
图5示出了根据本公开的实施例的小小区簇内的各个小小区的物理小区标识的分配状态的示意图。如图5所示，处于关闭状态的小小区的物理小区标识为该小区簇的簇内通用物理小区标识，而处于开启状态的小小区被分配了簇内唯一的物理小区标识。
以下将参照图6详细描述在目标小小区从关闭状态转换为开启状态时，物理小区标识分配单元204如何为目标小小区分配簇内唯一的物理小区标识。图6是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识的分配状态的示意图。
根据图6，目标小小区簇内当前处于开启状态的小小区的物理小区标识分配情况如以下表4所示。
表4
开启状态小区 位置 PCI CSI-RS配置
小区1 (x_1,y_1) 21  
小区2 (x_2,y_2) 17  
小区3 (x_3,y_3) 31  
小区4 (x_4,y_4) 43  
小区5 (x_5,y_5) 7  
小区6 (x_6,y_6) 24  
小区7 (x_7,y_7) 54  
小区8 (x_8,y_8) 38  
小区9 (x_9,y_9) 65  
作为示例，以下将描述当图6所示的作为目标小小区的小小区0从关闭状态转换为开启状态时，小小区0的簇内唯一物理小区标识的分配方式。
第一示例方式
优选地，在预定分组方式为基于物理小区标识的值与3的模运算的结果的情况下，在目标小小区从关闭状态转换为开启状态时，物理小区标识分配单元204可被配置成以使得目标小小区与目标小小区所在的目标小小区簇内或预定区域内的处于开启状态的小小区的主同步信号之间的冲突最小化的方式来确定目标小小区的簇内唯一物理小区标识。
具体地，作为示例，可通过以下处理步骤来确定待开启的小小区0的簇内唯一物理小区标识所属的分组。
步骤1A：计算小小区0所在的小小区簇内或预定区域内的处于开启状态的小小区到小小区0的距离R。
步骤2A：配置n、d_0、d_1、…、d_n的值，i＝0。其中，n表示在小小区簇内或预定区域内所划分的区域的数量(在图6的示例中，n表示所划分的圆的数量，这里为3)，d_i表示以小小区0为圆心的圆的半径。应理解，n、d_0、d_1、…、d_n的值可以是预先设定的经验值，或者也可以根据具体的网络状况来设置，并且d_0、d_1、…、d_n的值可以相同，或者也可以不同。
步骤3A：计算距离R(d_i≤R<d_i+1)内的开启状态的小小区的PCI-mod-3的值并计数。
步骤4A：如果计数存在唯一最小值，则将小小区0映射到该值对应的PCI分组；如果不存在且i＝n-1，则将小小区0映射到任一剩余值对应的PCI分组；如果不存在且i≠n-1，则继续执行以下步骤5A。
步骤5A：排除非最小值对应的PCI分组，i＝i+1，并且返回步骤3A。
以图6为例，统计结果如以下表5所示。
表5
Figure PCTCN2015088001-appb-000003
可以看出，在表5所示的示例中，小小区0被映射到PCI_mod_3的值为2的分组，从而能够尽量避免小小区0与其它小小区的PSS之间的冲突。
这里，应指出，上述表5中的符号“x”表示未统计的值，这是由于根据上述处理步骤，无需再考虑这些区域中的小小区，从而简化计算步骤。当然，也可以预先统计出该小小区簇或预定区域内的所有数据。这同样适用于以下示例。
应理解，以上处理步骤仅为示例而非限制，并且本领域人员可以根据本公开的原理而想到其它具体的分配方式，只要符合尽量避免PSS冲突的原则即可。
第二示例方式
替选地，在分组方式为基于物理小区标识的值与6的模运算的结果的情况下，在目标小小区从关闭状态转换为开启状态时，物理小区标识分配单元204可被配置成以使得目标小小区与目标小小区所在的目标小小区簇内或预定区域内的处于开启状态的小小区的小区特定频率偏移之间的冲突最小化的方式来确定目标小小区的簇内唯一物理小区标识。
具体地，作为示例，可通过以下处理步骤来确定待开启的小小区0的簇内唯一物理小区标识所属的分组。
步骤1B：计算小小区0所在的小小区簇内或预定区域内的处于开启状态的小小区到小小区0的距离R。
步骤2B：配置n、d_0、d_1、…、d_n的值，i＝0。其中，n表示在小小区簇内或预定区域内所划分的区域的数量(在图6的示例中，n表示所划分的圆的数量，这里为3)，d_i表示以小小区0为圆心的圆的半径。应理解，n、d_0、d_1、…、d_n的值可以是预先设定的经验值，或者也可以根据具体的网络状况来设置，并且d_0、d_1、…、d_n的值可以相同，或者也可以不同。
步骤3B：计算距离R(d_i≤R<d_i+1)内的开启状态的小小区的PCI-mod-6的值并计数。
步骤4B：如果计数存在唯一最小值，则将小小区0映射到该值对应的PCI分组；如果不存在且i＝n-1，则将小小区0映射到任一剩余值对应 的PCI分组；如果不存在且i≠n-1，则执行以下步骤5B。
步骤5B：排除非最小值对应的PCI分组，i＝i+1，并且返回步骤3B。
统计结果例如如以下表6所示。
表6
Figure PCTCN2015088001-appb-000004
可以看出，在表6所示的示例中，小小区0被映射到PCI_mod_6的值为4的分组，以尽量避免小小区0与其它小小区的小区特定频率偏移之间的冲突。
应理解，以上处理步骤仅为示例而非限制，并且本领域人员可以根据本公开的原理而想到其它具体的分配方式，只要符合尽量避免小区特定频率偏移冲突的原则即可。
第三示例方式
替选地，在分组方式为基于物理小区标识的值与3的模运算的结果和物理小区标识的值与6的模运算的结果两者的情况下，在目标小小区从关闭状态转换为开启状态时，物理小区标识分配单元204可被配置成以使得目标小小区与目标小小区所在的目标小小区簇内或预定区域内的处于开启状态的小小区的主同步信号之间的冲突以及小区特定频率偏移之间的冲突最小化的方式来确定目标小小区的簇内唯一物理小区标识。
具体地，作为示例，可通过以下处理步骤来确定待开启的小小区0的簇内唯一物理小区标识所属的分组。
步骤1C：计算小小区0所在的小小区簇内或预定区域内的处于开启状态的小小区到小小区0的距离R。
步骤2C：配置n、d_0、d_1、…、d_n的值，i＝0，j＝0。其中，n表示在小小区簇内或预定区域内所划分的区域的数量(在图6的示例中，n表示所划分的圆的数量，这里为3)，d_i表示以小小区0为圆心的圆的半径。应理解，n、d_0、d_1、…、d_n的值可以是预先设定的经验值，或者也可以根据具体的网络状况来设置，并且d_0、d_1、…、d_n的值可以相同，或者也可以不同。
步骤3C：计算距离R(d_i≤R<d_i+1)内的开启状态的小小区的PCI-mod-3的值并计数。
步骤4C：如果计数存在唯一最大值，则排除该值对应的PCI分组。如果i＝0，则执行步骤7C；如果i≥1，则执行步骤5C。
步骤5C：比较距离R(d_j≤R<d_j+1)内基于PCI-mod-6值的小区记数，若记数存在唯一最小值，将该小小区映射到该值对应的PCI分组。若记数不存在唯一最小值，继续执行步骤6C。
步骤6C：如果j＝i-1，则继续执行步骤7C，如果j<i-1，则j＝j+1，并且返回步骤5C。
步骤7C：计算距离R(d_i≤R<d_i+1)内的开启状态的小小区的PCI-mod-6的值并计数。
步骤8C：如果记数存在唯一最小值，将小小区0映射到该值对应的PCI分组；如果不存在且i＝n-1，则将小小区0映射到任一剩余值对应的PCI分组。如果不存在且i≠n-1，则继续执行步骤9C。
步骤9C：如果计数存在唯一最大值，则排除该值对应的PCI分组，i＝i+1，j＝0，并且返回步骤3C。
统计结果例如如以下表7所示。
表7
Figure PCTCN2015088001-appb-000005
可以看出，在表7所示的示例中，小小区0被映射到PCI_mod_6的值为2的分组。
替选地，在上述示例中，基于避免PSS冲突的优先级高于避免小区特定频率偏移冲突的优先级来确定小小区0的物理小区标识所属的分组，然而也可基于避免小区特定频率偏移冲突的优先级高于避免PSS冲突的优先级来确定小小区0的物理小区标识所属的分组。具体步骤如下：
步骤1D：计算小小区0所在的小小区簇内或预定区域内的处于开启状态的小小区到小小区0的距离R。
步骤2D：配置n、d_0、d_1、…、d_n的值，i＝0，j＝0。其中，n表示在小小区簇内或预定区域内所划分的区域的数量(在图6的示例中，n表示所划分的圆的数量，这里为3)，d_i表示以小小区0为圆心的圆的半径。应理解，n、d_0、d_1、…、d_n的值可以是预先设定的经验值，或者也可以根据具体的网络状况来设置，并且d_0、d_1、…、d_n的值可以相同，或者也可以不同。
步骤3D：计算距离R(d_i≤R<d_i+1)内的开启状态的小小区的PCI-mod-6的值并计数。
步骤4D：如果计数存在唯一最大值，则排除该值对应的PCI分组。如果i＝0，则执行步骤7D；如果i≥1，则执行步骤5D。
步骤5D：比较距离R(d_j≤R<d_j+1)内基于PCI-mod-3值的小区记数，若记数存在唯一最小值，将该小小区映射到该值对应的PCI分组。若记数不存在唯一最小值，继续执行步骤6D。
步骤6D：如果j＝i-1，则继续执行步骤7D，如果j<i-1，则j＝j+1，并 且返回步骤5D。
步骤7D：计算距离R(d_i≤R<d_i+1)内的开启状态的小小区的PCI-mod-3的值并计数。
步骤8D：如果记数存在唯一最小值，将小小区0映射到该值对应的PCI分组；如果不存在且i＝n-1，则将小小区0映射到任一剩余值对应的PCI分组。如果不存在且i≠n-1，则继续执行步骤9D。
步骤9D：如果计数存在唯一最大值，则排除该值对应的PCI分组，i＝i+1，j＝0，并且返回步骤3D。
应理解，以上处理步骤仅为示例而非限制，并且本领域人员可以根据本公开的原理而想到其它具体的分配方式，只要符合尽量避免PSS冲突和小区特定频率偏移冲突的原则即可。
在根据上述任一方式确定了待开启的目标小小区的物理小区标识所属的PCI分组之后，可以从小小区簇的簇内可用PCI集合中随机选择属于该PCI分组的可用PCI分配给目标小小区。
此外，优选地，针对小小区开启/关闭状态快速转换的场景，为了简化小小区的PCI分配，还可采用以下快速分配方法：即，在部署小小区时将小小区的PCI配置为映射到特定的分组，从而当小小区从关闭状态转换为开启状态时，可以直接为该小小区分配特定的分组内可用的PCI。
具体地，物理小区标识分配单元204可进一步被配置成以使得相邻小小区的物理小区标识被映射到不同的分组的方式来确定各个小小区的物理小区标识所属的分组，并且在目标小小区从关闭状态转换为开启状态时，从目标小小区的物理小区标识所属的分组中选择该分组内可用的物理小区标识分配给目标小小区作为簇内唯一物理小区标识。以下的图7至图9示出了基于该快速分配方法，在不同情况下的PCI分组映射的理想效果。
图7是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识分组映射的示例的示意图。在图7所示的示例中，PCI根据PCI-mod-3值被分为3组，并且相邻的小小区被映射到不同的PCI分组，以尽量避免PSS冲突。
图8是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识分组映射的另一示例的示意图。在图8所示的示例中，PCI根据PCI-mod-6值被分为6组，并且相邻的小小区被映射到不同的PCI分组，以尽量避免小区特定频率偏移冲突。
图9是示出根据本公开的实施例的小小区簇内的各个小小区的物理小区标识分组映射的另一示例的示意图。在图9所示的示例中，PCI根据PCI-mod-3值和PCI-mod-6值被分为6组，并且相邻的小小区被映射到不同的PCI分组，以尽量避免PSS冲突和小区特定频率偏移冲突。
此外，优选地，物理小区标识分配单元204可进一步被配置成对于周期性开启/关闭且其开启时间没有重叠的两个相邻小小区，为这两个小小区分配相同的PCI分组或者在这两个小区均处于开启状态时为它们分配相同的PCI。
优选地，簇内可用物理小区标识集合分配单元206可进一步被配置成根据小小区簇内的小小区的开启/关闭状态而动态地管理该小小区簇的簇内可用PCI集合。具体地，簇内可用物理小区标识集合分配单元206可在目标小小区处于开启状态时，从目标小小区簇的簇内可用PCI集合中删除分配给目标小小区的PCI，而在目标小小区处于关闭状态时，由于目标小小区的PCI此时被设置为簇内通用PCI，因此可将目标小小区在关闭之前所使用的PCI添加到目标小小区簇的簇内可用PCI集合中。
根据上述实施例，可以根据小小区的开启/关闭状态而动态地管理小小区簇内的PCI分配情况，减小了小区规划负担和维护成本且具有较高的灵活性。
接下来将参照图10和图11描述PCI动态分配的情况下的小区搜索和接入过程。应指出，在本公开的图10和图11所示的示例中以切换流程为例描述了小小区开关前后的PCI变化对该流程造成的影响及相应改进方案。然而，本领域技术人员基于本公开的精神可以了解，在需要进行例如小区同步、信道估计、控制信道解码等涉及PCI的操作中，基站应当向用户设备发送关于对应于一个特定GCI(global cell ID，全球小区ID)的小区的PCI的变化信息，例如可以通过RRC信令告知用户设备。
图10是示出根据本公开的实施例的在物理小区标识的动态分配的情况下用于小区搜索和接入的信令交互流程的示意图，并且图11是示出根据本公开的实施例的物理小区标识的动态分配的情况下用于小区搜索和接入的另一信令交互流程的示意图。
应指出，图10和图11所示的用于小区搜索和接入的(移动性)信令交互流程与现有技术的区别之处在于，由于目标小小区在开启状态和关闭状态所使用的物理小区标识不同，因此需要将该物理小区标识的变化通知 用户设备，从而使得用户设备在接入目标小小区之前获得目标小小区的开启状态的物理小区标识。这样的区别在图10和图11中以阴影块示出。
在图10和图11中，服务小区是当前服务于用户设备的小区，其可以是宏小区或者小小区，目标小小区是用户设备要接入的小小区。接下来，将分别参照图10和图11描述具体的信令交互流程。
如图10所示，首先，作为一个示例，服务小区向需要进行小区搜索的用户设备通知邻近小小区当前的PCI、该邻近小小区发送小区发现参考信号(DRS)的时间及其配置或者邻近小小区的CSI-RS配置信息(这包含于图10所示的“测量控制”中)。用户设备在根据上述PCI同步到邻近小小区并且基于该邻近小小区的特定CSI-RS/DRS进行了测量之后报告给服务小区(这对应于图10所示的“测量报告”)，服务小区基于从用户设备接收的小区搜索的测量结果而判定UE是否需要接入邻近小小区中的目标小小区(这对应于图10中的“接入判定”)，并且在判定需要接入目标小小区的情况下，服务小区向目标小小区发送接入请求(这对应于图10中的“接入请求”)。
目标小小区在接收到该接入请求之后，从关闭状态转换为开启状态，并且将其物理小区标识从簇内通用物理小区标识改变为簇内唯一的物理小区标识(这对应于图10中的阴影块“开启”)。应理解，这里的簇内唯一物理小区标识例如可通过以上实施例中描述的方式来确定，其选自小小区簇的簇内可用物理小区标识集合，并且不同于目标小小区关闭状态时所使用的簇内通用物理小区标识。
接下来，目标小小区对接入请求进行响应以向服务小区通知其物理小区标识的变化(这对应于图10中的“接入请求确认”)。
服务小区在接收到来自目标小小区的通知之后向用户设备发送指示(这对应于图10中的“接入命令”)。应理解，在该示例中，通知中不包括目标小小区的开启状态的物理小区标识，因此该“接入命令”中包括指示用户设备重新与目标小小区进行下行同步的指示，以使得用户设备从目标小小区获得其开启状态的物理小区标识。
用户设备在接收到来自服务小区的指示之后与目标小小区重新进行下行同步(这对应于图10中的阴影块“与目标小小区下行同步”)，以获得目标小小区的开启状态的物理小区标识。
在获得目标小小区的开启状态的物理小区标识之后的信令交互过程 与现有技术中类似，在此不再赘述。
应指出，尽管在图10所示的示例中接入请求来自服务小区，但是本公开不限于此，例如，在C-RAN的架构下，也可以由基带云来确定接入请求并通知目标小小区。
图11所示的信令交互流程与图10类似，区别仅在于，在来自目标小小区的“接入请求确认”中包括目标小小区的开启状态的物理小区标识，从而用户设备不需要与目标小小区重新进行下行同步即可从来自服务小区的“接入命令”中直接获得目标小小区的开启状态的物理小区标识。其余的信令交互流程可参见以上关于图10的描述，在此不再重复进行描述。
接下来将结合以上参照图10和图11描述的信令交互流程，参照图12至图14详细描述在PCI动态分配的情况下，目标小小区侧、服务小区侧以及用户设备侧的功能配置示例。
图12是示出根据本公开的实施例的无线通信系统中的装置的功能配置示例的框图。该装置位于目标小小区侧。
如图12所示，装置1200可包括接入确定单元1202和控制单元1204。
接入确定单元1202可被配置成确定用户设备的接入需求。应理解，这里的接入需求可以包括但不限于例如切换需求、双连接需求或者跨站点的载波聚合需求等。
控制单元1204可被配置成基于用户设备的接入需求，将装置1200所在的目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
优选地，在目标小小区处于关闭状态时，目标小小区的物理小区标识是目标小小区所在的小小区簇内的多个小小区处于关闭状态时共享的簇内通用物理小区标识，其中预定范围内不同小小区簇的簇内通用物理小区标识是不同的，并且当目标小小区处于开启状态时，目标小小区的新物理小区标识是选自目标小小区所在的小小区簇内的簇内可用物理小区标识集合的簇内唯一物理小区标识，其中簇内可用物理小区标识集合表示小小区簇内的所有小小区处于开启状态时可用的簇内唯一物理小区标识的集合。控制单元1204例如可通过以上实施例描述的方式来分配开启状态所使用的簇内唯一物理小区标识。
应理解，这里的簇内通用物理小区标识和簇内可用物理小区标识集合可预先存储在装置1200中，或者可从外部装置接收，或者也可由装置1200 自身通过例如上述实施例中描述的方式来确定。
可选地，装置1200还可包括收发单元1206。收发单元1206可被配置成接收来自服务小区的接入请求，并且接入确定单元1202可基于来自服务小区的接入请求而确定接入需求。服务小区是当前服务于用户设备的小区，其可以是宏小区或者小小区，本公开对此不做限制。
在接收到接入请求之后，控制单元1204可对接入请求进行响应，以由收发单元1206向服务小区发送通知，该通知指示目标小小区的物理小区标识的变化，即，目标小小区从关闭状态转换为开启状态时，其物理小区标识从簇内通用物理小区标识改变为选自簇内可用物理小区标识集合中的簇内唯一物理小区标识。应理解，这种指示可以是显示的也可以是隐式的。
在隐式地指示物理小区标识变化的情况下，用户设备需要与目标小小区进行下行同步以获取目标小小区的新物理小区标识，这对应于例如图10所示的情况。
在显示地指示物理小区标识变化的情况下，该通知也可以包括控制单元为目标小小区所分配的开启状态下的新物理小区标识，从而服务小区可以从所接收的通知直接获得目标小小区的新物理小区标识，这对应于例如图11所示的情况。
接下来，将参照图13描述根据本公开的实施例的服务小区侧的装置的功能配置示例。图13是示出根据本公开的实施例的无线通信系统中的装置的功能配置示例的框图。该装置位于服务小区侧。
如图13所示，装置1300可包括判定单元1302、收发单元1304和指示单元1306。
判定单元1302可被配置成根据装置1300所在的服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定用户设备是否需要从服务小区接入到邻近小小区中的目标小小区。
收发单元1304可被配置成在判定单元1302判定需要从服务小区接入到目标小小区的情况下，向目标小小区发送接入请求以及从目标小小区接收对接入请求的响应。
指示单元1306可被配置成根据所接收的响应而向用户设备发送指示，该指示包含接入到目标小小区的控制信息，以使得用户设备根据目标小小区的新物理小区标识而接入到目标小小区。该新物理小区标识是目标 小小区从关闭状态转换为开启状态时新分配的物理小区标识并且不同于关闭状态所使用的物理小区标识。例如，如上所述，关闭状态所使用的物理小区标识为簇内通用物理小区标识，而新物理小区标识为选自簇内可用物理小区标识集合的簇内唯一物理小区标识。
优选地，指示单元1306向用户设备发送的指示可包括指示用户设备重新与目标小小区进行下行同步的重同步指示，以使得用户设备从目标小小区获得其新物理小区标识(这对应于例如图10所示的情况)。替选地，该指示也可包括目标小小区的新物理小区标识，从而用户设备无需与目标小小区重新进行下行同步即可直接从该指示获得目标小小区的新物理小区标识(这对应于例如图11所示的情况)。
图14是示出根据本公开的实施例的无线通信系统中的用户设备侧的装置的功能配置示例的框图。
如图14所示，装置1400可包括收发单元1402和控制单元1404。
收发单元1402可被配置成将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从服务小区接收关于接入到邻近小小区中的目标小小区的接入指示。
控制单元1404可被配置成基于接入指示获取目标小小区的新物理小区标识，以根据该新物理小区标识而接入目标小小区。该新物理小区标识是目标小小区从关闭状态转换为开启状态时新分配的物理小区标识并且不同于关闭状态所使用的物理小区标识。例如，如上所述，关闭状态所使用的物理小区标识为簇内通用物理小区标识，而新物理小区标识为选自簇内可用物理小区标识集合的簇内唯一物理小区标识。
优选地，该接入指示中可包括指示用户设备重新与目标小小区进行下行同步的重同步指示，并且控制单元1404可根据重同步指示而重新与目标小小区进行下行同步以获取目标小小区的新物理小区标识，并且根据新物理小区标识而控制用户设备接入目标小小区(这对应于例如图10所示的情况)。替选地，该接入指示也可包括目标小小区的新物理小区标识，从而控制单元1404可直接根据接入指示中的新物理小区标识控制用户设备接入目标小小区，而无需与目标小小区重新进行下行同步(这对应于例如图11所示的情况)。
应理解，尽管以上描述了根据本公开的实施例的无线通信系统中的装置的功能配置示例，但是应理解，这仅是示例而非限制，并且本领域技术 人员可根据本公开的原理对以上实施例进行修改，例如可对各个实施例中的功能模块进行添加、删除或者组合等，并且这样的修改均落入本公开的范围内。
与根据本公开的实施例的装置相对应地，本公开还提供了无线通信系统中的方法。以下将参照图15至图18描述根据本公开的实施例的无线通信系统中的方法的过程示例。
图15是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图。图15所示的方法对应于以上参照图1和图2描述的无线通信系统中的装置。
如图15所示，在分组步骤S1502中，以预定分组方式根据物理小区标识的值对物理小区标识进行分组。
接下来，在物理小区标识分配步骤S1504中，至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识。优选地，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
图16是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图。图16所示的方法对应于以上参照图12描述的无线通信系统中的装置。该方法可在目标小小区侧执行。
如图16所示，在接入确定步骤S1602中，确定用户设备的接入需求。这里的接入需求可以包括但不限于例如切换需求、双连接需求或者跨站点的载波聚合需求等。
接下来，在控制步骤S1604中，基于用户设备的接入需求，将目标小小区从关闭状态转换为开启状态，并且重新为目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
图17是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图。图17所示的方法对应于以上参照图13描述的无线通信系统中的装置。该方法可在服务小区侧执行。
如图17所示，在判定步骤S1702中，根据服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定用户设备是否需要从服务小区接入到邻近小小区中的目标小小区。
接下来，在收发步骤S1704中，在判定需要从服务小区接入到目标小 小区的情况下，向目标小小区发送接入请求以及从目标小小区接收对接入请求的响应。
然后，在指示步骤S1706中，根据所接收的响应而向用户设备发送指示，该指示包含接入到目标小小区的控制信息，以使得用户设备根据目标小小区的新物理小区标识而接入到目标小小区。该新物理小区标识是目标小小区从关闭状态转换为开启状态时新分配的物理小区标识并且不同于关闭状态所使用的物理小区标识。优选地，该指示可包括指示用户设备与目标小小区重新进行下行同步的重同步指示(参照例如图10)，或者，该指示也可包括目标小小区的新物理小区标识(参照例如图11)。
图18是示出根据本公开的实施例的无线通信系统中的方法的过程示例的流程图。图18所示的方法对应于以上参照图14描述的无线通信系统中的装置。该方法可在用户设备侧执行。
如图18所示，在收发步骤S1802中，将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从服务小区接收关于接入到邻近小小区中的目标小小区的接入指示。
接下来，在控制步骤S1804中，基于接入指示获取目标小小区的新物理小区标识，以根据该新物理小区标识而接入目标小小区。该新物理小区标识是目标小小区从关闭状态转换为开启状态时新分配的物理小区标识并且不同于关闭状态所使用的物理小区标识。
应指出，尽管以上描述了根据本公开的实施例的无线通信系统中的方法的过程示例，但是这仅是示例而非限制，并且本领域技术人员可根据本公开的原理对以上实施例进行修改，例如可对各个实施例中的步骤进行添加、删除或者组合等，并且这样的修改均落入本公开的范围内。
此外，还应指出，这里的方法实施例是与上述装置实施例相对应的，因此在方法实施例中未详细描述的内容可参见装置实施例中相应位置的描述，在此不再重复描述。
应理解，根据本公开的实施例的存储介质和程序产品中的机器可执行的指令还可以被配置成执行与上述装置实施例相对应的方法，因此在此未详细描述的内容可参考先前相应位置的描述，在此不再重复进行描述。
相应地，用于承载上述包括机器可执行的指令的程序产品的存储介质也包括在本发明的公开中。该存储介质包括但不限于软盘、光盘、磁光盘、存储卡、存储棒等等。
另外，还应该指出的是，上述系列处理和装置也可以通过软件和/或固件实现。在通过软件和/或固件实现的情况下，从存储介质或网络向具有专用硬件结构的计算机，例如图19所示的通用个人计算机1900安装构成该软件的程序，该计算机在安装有各种程序时，能够执行各种功能等等。
在图19中，中央处理单元(CPU)1901根据只读存储器(ROM)1902中存储的程序或从存储部分1908加载到随机存取存储器(RAM)1903的程序执行各种处理。在RAM 1903中，也根据需要存储当CPU 1901执行各种处理等等时所需的数据。
CPU 1901、ROM 1902和RAM 1903经由总线1904彼此连接。输入/输出接口1905也连接到总线1904。
下述部件连接到输入/输出接口1905：输入部分1906，包括键盘、鼠标等等；输出部分1907，包括显示器，比如阴极射线管(CRT)、液晶显示器(LCD)等等，和扬声器等等；存储部分1908，包括硬盘等等；和通信部分1909，包括网络接口卡比如LAN卡、调制解调器等等。通信部分1909经由网络比如因特网执行通信处理。
根据需要，驱动器1910也连接到输入/输出接口1905。可拆卸介质1911比如磁盘、光盘、磁光盘、半导体存储器等等根据需要被安装在驱动器1910上，使得从中读出的计算机程序根据需要被安装到存储部分1908中。
在通过软件实现上述系列处理的情况下，从网络比如因特网或存储介质比如可拆卸介质1911安装构成软件的程序。
本领域的技术人员应当理解，这种存储介质不局限于图19所示的其中存储有程序、与设备相分离地分发以向用户提供程序的可拆卸介质1911。可拆卸介质1911的例子包含磁盘(包含软盘(注册商标))、光盘(包含光盘只读存储器(CD-ROM)和数字通用盘(DVD))、磁光盘(包含迷你盘(MD)(注册商标))和半导体存储器。或者，存储介质可以是ROM 1902、存储部分1908中包含的硬盘等等，其中存有程序，并且与包含它们的设备一起被分发给用户。
下面将给出关于本公开的应用示例。
本公开的技术能够应用于各种产品。例如，上述装置100和200可以被实现为任何类型的服务器，诸如塔式服务器、机架式服务器以及刀片式服务器。服务器一般设置在核心网侧，可以用来实现根据本公开的物理小 区标识分配功能。装置100和200也可以为安装在服务器上的控制模块(诸如包括单个晶片的集成电路模块，以及插入到刀片式服务器的槽中的卡或刀片(blade))。
例如，上述服务小区的基站和目标小小区的基站等可以被实现为任何类型的演进型节点B(eNB)，诸如宏eNB和小eNB。小eNB可以为覆盖比宏小区小的小区的eNB，诸如微微eNB、微eNB和家庭(毫微微)eNB。代替地，上述服务小区的基站和目标小小区的基站可以被实现为任何其他类型的基站，诸如NodeB和基站收发台(BTS)。应指出，分配PCI的功能也可以由宏基站或小基站实现，并且由基站实现分配PCI功能时的结构可参考该部分的说明。上述服务小区的基站和目标小小区的基站可以包括：被配置为控制无线通信的主体(也称为基站设备)；以及设置在与主体不同的地方的一个或多个远程无线头端(RRH)。其中，随着C-RAN(Centralized,Cooperative,Cloud RAN)的发展，上述的控制无线通信的主体也可以是基带云端的处理设备例如服务器。另外，下面将描述的各种类型的终端均可以通过暂时地或半持久性地执行基站功能而作为基站工作。
例如，上述用户设备可以被实现为移动终端(诸如智能电话、平板个人计算机(PC)、笔记本式PC、智能穿戴设备、便携式游戏终端、便携式/加密狗型移动路由器和数字摄像装置)或者车载终端(诸如汽车导航设备)。上述用户设备还可以被实现为执行机器对机器(M2M)通信的终端(也称为机器类型通信(MTC)终端)。此外，上述用户设备可以为安装在上述终端中的每个终端上的无线通信模块(诸如包括单个晶片的集成电路模块)。
[1.关于执行物理小区标识分配功能的装置的应用示例]
图20是示出可以应用本公开的技术的服务器2000的示意性配置的示例的框图。服务器2000包括处理器2001、存储器2002、存储装置2003、网络接口2004以及总线2006。
处理器2001可以为例如中央处理单元(CPU)或数字信号处理器(DSP)，并且控制服务器2000的功能。存储器2002包括随机存取存储器(RAM)和只读存储器(ROM)，并且存储数据和由处理器2001执行的程序。存储装置2003可以包括存储介质，诸如半导体存储器和硬盘。
网络接口2004为用于将服务器2000连接到有线通信网络2005的有 线通信接口。有线通信网络2005可以为诸如演进分组核心网(EPC)的核心网或者诸如因特网的分组数据网络(PDN)。
总线2006将处理器2001、存储器2002、存储装置2003和网络接口2004彼此连接。总线2006可以包括各自具有不同速度的两个或更多个总线(诸如高速总线和低速总线)。
在图20所示的服务器2000中，通过使用图1和图2所描述的分组单元、物理小区标识分配单元和簇内可用物理小区标识集合分配单元可以由处理器2001实现。
[2.关于基站的应用示例]
(第一应用示例)
图21是示出可以应用本公开的技术的eNB的示意性配置的第一示例的框图。eNB 2100包括一个或多个天线2110以及基站设备2120。基站设备2120和每个天线2110可以经由RF线缆彼此连接。
天线2110中的每一个均包括单个或多个天线元件(诸如包括在多输入多输出(MIMO)天线中的多个天线元件)，并且用于基站设备2120发送和接收无线信号。如图21所示，eNB 2100可以包括多个天线2110。例如，多个天线2110可以与eNB 2100使用的多个频带兼容。虽然图21示出其中eNB 2100包括多个天线2110的示例，但是eNB 2100也可以包括单个天线2110。
基站设备2120包括控制器2121、存储器2122、网络接口2123以及无线通信接口2125。
控制器2121可以为例如CPU或DSP，并且操作基站设备2120的较高层的各种功能。例如，控制器2121根据由无线通信接口2125处理的信号中的数据来生成数据分组，并经由网络接口2123来传递所生成的分组。控制器2121可以对来自多个基带处理器的数据进行捆绑以生成捆绑分组，并传递所生成的捆绑分组。控制器2121可以具有执行如下控制的逻辑功能：该控制诸如为无线资源控制、无线承载控制、移动性管理、接纳控制和调度。该控制可以结合附近的eNB或核心网节点来执行。存储器2122包括RAM和ROM，并且存储由控制器2121执行的程序和各种类型的控制数据(诸如终端列表、传输功率数据以及调度数据)。
网络接口2123为用于将基站设备2120连接至核心网2124的通信接口。控制器2121可以经由网络接口2123而与核心网节点或另外的eNB 进行通信。在此情况下，eNB 2100与核心网节点或其他eNB可以通过逻辑接口(诸如S1接口和X2接口)而彼此连接。网络接口2123还可以为有线通信接口或用于无线回程线路的无线通信接口。如果网络接口2123为无线通信接口，则与由无线通信接口2125使用的频带相比，网络接口2123可以使用较高频带用于无线通信。
无线通信接口2125支持任何蜂窝通信方案(诸如长期演进(LTE)和LTE-先进)，并且经由天线2110来提供到位于eNB 2100的小区中的终端的无线连接。无线通信接口825通常可以包括例如基带(BB)处理器2126和RF电路2127。BB处理器2126可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行层(例如L1、介质访问控制(MAC)、无线链路控制(RLC)和分组数据汇聚协议(PDCP))的各种类型的信号处理。代替控制器2121，BB处理器2126可以具有上述逻辑功能的一部分或全部。BB处理器2126可以为存储通信控制程序的存储器，或者为包括被配置为执行程序的处理器和相关电路的模块。更新程序可以使BB处理器2126的功能改变。该模块可以为插入到基站设备2120的槽中的卡或刀片。可替代地，该模块也可以为安装在卡或刀片上的芯片。同时，RF电路2127可以包括例如混频器、滤波器和放大器，并且经由天线2110来传送和接收无线信号。
如图21所示，无线通信接口2125可以包括多个BB处理器2126。例如，多个BB处理器2126可以与eNB 2100使用的多个频带兼容。如图21所示，无线通信接口2125可以包括多个RF电路2127。例如，多个RF电路2127可以与多个天线元件兼容。虽然图21示出其中无线通信接口2125包括多个BB处理器2126和多个RF电路2127的示例，但是无线通信接口2125也可以包括单个BB处理器2126或单个RF电路2127。
(第二应用示例)
图22是示出可以应用本公开的技术的eNB的示意性配置的第二示例的框图。eNB 2230包括一个或多个天线2240、基站设备2250和RRH 2260。RRH 2260和每个天线2240可以经由RF线缆而彼此连接。基站设备2250和RRH 2260可以经由诸如光纤线缆的高速线路而彼此连接。
天线2240中的每一个均包括单个或多个天线元件(诸如包括在MIMO天线中的多个天线元件)并且用于RRH 2260发送和接收无线信号。如图22所示，eNB 2230可以包括多个天线2240。例如，多个天线2240可以与eNB 2230使用的多个频带兼容。虽然图22示出其中eNB 2230 包括多个天线2240的示例，但是eNB 2230也可以包括单个天线2240。
基站设备2250包括控制器2251、存储器2252、网络接口2253、无线通信接口2255以及连接接口2257。控制器2251、存储器2252和网络接口2253与参照图21描述的控制器2121、存储器2122和网络接口2123相同。
无线通信接口2255支持任何蜂窝通信方案(诸如LTE和LTE-先进)，并且经由RRH 2260和天线2240来提供到位于与RRH 2260对应的扇区中的终端的无线通信。无线通信接口2255通常可以包括例如BB处理器2256。除了BB处理器2256经由连接接口2257连接到RRH 2260的RF电路2264之外，BB处理器2256与参照图21描述的BB处理器2126相同。如图22所示，无线通信接口2255可以包括多个BB处理器2256。例如，多个BB处理器2256可以与eNB 2230使用的多个频带兼容。虽然图22示出其中无线通信接口2255包括多个BB处理器2256的示例，但是无线通信接口2255也可以包括单个BB处理器2256。
连接接口2257为用于将基站设备2250(无线通信接口2255)连接至RRH 2260的接口。连接接口2257还可以为用于将基站设备2250(无线通信接口2255)连接至RRH 2260的上述高速线路中的通信的通信模块。
RRH 2260包括连接接口2261和无线通信接口2263。
连接接口2261为用于将RRH 2260(无线通信接口2263)连接至基站设备2250的接口。连接接口2261还可以为用于上述高速线路中的通信的通信模块。
无线通信接口2263经由天线2240来传送和接收无线信号。无线通信接口2263通常可以包括例如RF电路2264。RF电路2264可以包括例如混频器、滤波器和放大器，并且经由天线2240来传送和接收无线信号。如图22所示，无线通信接口2263可以包括多个RF电路2264。例如，多个RF电路2264可以支持多个天线元件。虽然图22示出其中无线通信接口2263包括多个RF电路2264的示例，但是无线通信接口2263也可以包括单个RF电路2264。
在图21和图22所示的eNB 2100和eNB 2230中，通过使用图12和图13所描述的收发单元1206和收发单元1304可以由无线通信接口2125以及无线通信接口2255和/或无线通信接口2263实现。功能的至少一部分也可以由控制器2121和控制器2251实现。
以上参照附图描述了本公开的优选实施例，但是本公开当然不限于以上示例。本领域技术人员可在所附权利要求的范围内得到各种变更和修改，并且应理解这些变更和修改自然将落入本公开的技术范围内。
例如，在以上实施例中包括在一个单元中的多个功能可以由分开的装置来实现。替选地，在以上实施例中由多个单元实现的多个功能可分别由分开的装置来实现。另外，以上功能之一可由多个单元来实现。无需说，这样的配置包括在本公开的技术范围内。
在该说明书中，流程图中所描述的步骤不仅包括以所述顺序按时间序列执行的处理，而且包括并行地或单独地而不是必须按时间序列执行的处理。此外，甚至在按时间序列处理的步骤中，无需说，也可以适当地改变该顺序。

Claims (28)

  1. 一种无线通信系统中的装置，所述装置包括：
    接入确定单元，被配置成确定用户设备的接入需求；以及
    控制单元，被配置成基于所述用户设备的接入需求，将所述装置所在的目标小小区从关闭状态转换为开启状态，并且重新为所述目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
  2. 根据权利要求1所述的装置，其中，还包括收发单元，被配置成接收来自服务小区的接入请求，所述接入确定单元基于该接入请求确定用户设备的接入需求，所述服务小区是当前服务于用户设备的小区。
  3. 根据权利要求2所述的装置，其中，所述控制单元还被配置成对所述接入请求进行响应，以由所述收发单元向所述服务小区发送通知，所述通知指示所述目标小小区的物理小区标识的变化。
  4. 根据权利要求3所述的装置，其中，所述通知包括所述目标小小区的新物理小区标识。
  5. 根据权利要求1至4任一项所述的装置，其中，当所述目标小小区处于关闭状态时，所述目标小小区的物理小区标识是所述目标小小区所在的小小区簇内的多个小小区处于关闭状态时共享的簇内通用物理小区标识，其中预定范围内不同小小区簇的簇内通用物理小区标识是不同的，并且当所述目标小小区处于开启状态时，所述目标小小区的新物理小区标识是选自所述目标小小区所在的小小区簇内的簇内可用物理小区标识集合的簇内唯一物理小区标识，其中所述簇内可用物理小区标识集合表示所述小小区簇内的所有小小区处于开启状态时可用的簇内唯一物理小区标识的集合。
  6. 一种无线通信系统中的装置，所述装置包括：
    判定单元，被配置成根据所述装置所在的服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定所述用户设备是否需要从所述服务小区接入到所述邻近小小区中的目标小小区；
    收发单元，被配置成在所述判定单元判定需要从所述服务小区接入到所述目标小小区的情况下，向所述目标小小区发送接入请求以及从所述目标小小区接收对所述接入请求的响应；以及
    指示单元，被配置成根据所述响应而向所述用户设备发送指示，所述指示包含接入到所述目标小小区的控制信息，以使得所述用户设备根据所述目标小小区的新物理小区标识而接入到所述目标小小区，
    其中，所述目标小小区的新物理小区标识是所述目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
  7. 根据权利要求6所述的装置，其中，当所述目标小小区处于关闭状态时，所述目标小小区的物理小区标识是所述目标小小区所在的小小区簇内的多个小小区处于关闭状态时共享的簇内通用物理小区标识，其中预定范围内不同小小区簇的簇内通用物理小区标识是不同的，并且当所述目标小小区处于开启状态时，所述目标小小区的新物理小区标识是选自所述目标小小区所在的小小区簇内的簇内可用物理小区标识集合的簇内唯一物理小区标识，其中所述簇内可用物理小区标识集合表示所述小小区簇内的所有小小区处于开启状态时可用的簇内唯一物理小区标识的集合。
  8. 根据权利要求6或7所述的装置，其中，所述指示包括指示所述用户设备重新与所述目标小小区进行下行同步的重同步指示，以使得所述用户设备获得所述目标小小区的新物理小区标识。
  9. 根据权利要求6或7所述的装置，其中，所述指示中包括所述目标小小区的新物理小区标识。
  10. 一种无线通信系统中的用户设备侧的装置，所述装置包括：
    收发单元，被配置成将所述用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从所述服务小区接收关于接入到所述邻近小小区中的目标小小区的接入指示，所述服务小区是当前服务于所述用户设备的小区；以及
    控制单元，被配置成基于所述接入指示获取所述目标小小区的新物理小区标识，以根据所述新物理小区标识控制所述用户设备接入到所述目标小小区，
    其中，所述目标小小区的新物理小区标识是所述目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
  11. 根据权利要求10所述的装置，其中，当所述目标小小区处于关闭状态时，所述目标小小区的物理小区标识是所述目标小小区所在的小小 区簇内的多个小小区处于关闭状态时共享的簇内通用物理小区标识，其中预定范围内不同小小区簇的簇内通用物理小区标识是不同的，并且当所述目标小小区处于开启状态时，所述目标小小区的新物理小区标识是选自所述目标小小区所在的小小区簇内的簇内可用物理小区标识集合的簇内唯一物理小区标识，其中所述簇内可用物理小区标识集合表示所述小小区簇内的所有小小区处于开启状态时可用的簇内唯一物理小区标识的集合。
  12. 根据权利要求10或11所述的装置，其中，所述接入指示中包括指示所述用户设备重新与所述目标小小区进行下行同步的重同步指示，并且所述控制单元被配置成根据所述重同步指示重新与所述目标小小区进行下行同步以获取所述目标小小区的新物理小区标识，并且根据所述新物理小区标识而控制所述用户设备接入到所述目标小小区。
  13. 根据权利要求10或11所述的装置，其中，所述接入指示中包括所述目标小小区的新物理小区标识，并且所述控制单元被配置成根据所述接入指示中包括的所述新物理小区标识而控制所述用户设备接入到所述目标小小区。
  14. 一种无线通信系统中的装置，所述装置包括：
    分组单元，被配置成以预定分组方式根据物理小区标识的值对物理小区标识进行分组；以及
    物理小区标识分配单元，被配置成至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识，其中，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
  15. 根据权利要求14所述的装置，其中，所述物理小区标识分配单元进一步被配置成在目标小小区处于关闭状态时，将所述目标小小区所在的目标小小区簇的簇内通用物理小区标识分配给所述目标小小区并且为所述目标小小区配置簇内唯一的信道状态指示参考信号和/或包含簇内唯一的信道状态指示参考信号的发现参考信号，其中，所述簇内通用物理小区标识表示小小区簇内的所有小小区处于关闭状态时共享的物理小区标识，并且预定范围内不同小小区簇的簇内通用物理小区标识不同。
  16. 根据权利要求15所述的装置，还包括：
    簇内可用物理小区标识集合分配单元，被配置成根据预定的小小区簇间的物理小区标识复用条件和小小区簇中的小小区数量，为各个小小区簇 分配簇内可用物理小区标识集合，其中，所述簇内可用物理小区标识集合表示小小区簇内的所有小小区处于开启状态时可用的簇内唯一物理小区标识的集合，其中，不符合复用条件的小小区簇的簇内可用物理小区标识集合之间没有交集，
    其中，所述物理小区标识分配单元进一步被配置成根据为小小区簇分配的簇内通用物理小区标识和簇内可用物理小区标识集合，基于小小区的开启/关闭状态而确定小小区簇内的各个小小区的物理小区标识。
  17. 根据权利要求16所述的装置，其中，所述物理小区标识分配单元进一步被配置成对于待开启的所述目标小小区，基于所述预定分组方式、所述目标小小区簇内或预定区域内处于开启状态的小小区的位置以及所述目标小小区簇内或所述预定区域内的当前物理小区标识分配状态，确定所述目标小小区的物理小区标识所属的分组，并且根据该分组从所述目标小小区簇的簇内可用物理小区标识集合中随机选择可用的物理小区标识分配给所述目标小小区，
    并且其中，所述簇内可用物理小区标识集合分配单元被配置成在所述目标小小区处于开启状态时，从所述目标小小区簇的簇内可用物理小区标识集合中删除分配给所述目标小小区的物理小区标识，并且在所述目标小小区处于关闭状态时，将所述目标小小区在关闭之前所用的物理小区标识添加到所述目标小小区簇的簇内可用物理小区标识集合中。
  18. 根据权利要求14至17中任一项所述的装置，其中，所述预定分组方式选自以下之一：基于物理小区标识的值与3的模运算的结果；基于物理小区标识的值与6的模运算的结果；以及基于物理小区标识的值与3的模运算的结果和物理小区标识的值与6的模运算的结果两者。
  19. 根据权利要求18所述的装置，其中，所述物理小区标识分配单元进一步被配置成在所述预定分组方式为基于物理小区标识的值与3的模运算的结果的情况下，在目标小小区从关闭状态转换为开启状态时，以使得所述目标小小区与所述目标小小区所在的目标小小区簇内或预定区域内的处于开启状态的小小区的主同步信号之间的冲突最小化的方式来确定所述目标小小区的簇内唯一物理小区标识。
  20. 根据权利要求18所述的装置，其中，所述物理小区标识分配单元进一步被配置成在所述预定分组方式为基于物理小区标识的值与6的模运算的结果的情况下，在目标小小区从关闭状态转换为开启状态时，以 使得所述目标小小区与所述目标小小区所在的目标小小区簇内或预定区域的处于开启状态的小小区的小区特定频率偏移之间的冲突最小化的方式来确定所述目标小小区的簇内唯一物理小区标识。
  21. 根据权利要求18所述的装置，其中，所述物理小区标识分配单元进一步被配置成在所述预定分组方式为基于物理小区标识的值与3的模运算的结果和物理小区标识的值与6的模运算的结果两者的情况下，在目标小小区从关闭状态转换为开启状态时，以使得所述目标小小区与所述目标小小区所处的目标小小区簇内或预定区域的处于开启状态的小小区的主同步信号之间的冲突以及小区特定频率偏移之间的冲突最小化的方式来确定所述目标小小区的物理小区标识。
  22. 根据权利要求15所述的装置，其中，所述物理小区标识分配单元进一步被配置成以使得相邻小小区的物理小区标识被映射到不同的分组的方式来确定各个小小区的物理小区标识所属的分组，并且在目标小小区从关闭状态转换为开启状态时，从所述目标小小区的物理小区标识所属的分组中选择该分组内可用的物理小区标识分配给所述目标小小区作为簇内唯一物理小区标识。
  23. 根据权利要求22所述的装置，其中，所述物理小区标识分配单元进一步被配置成对于周期性开启/关闭且其开启时间没有重叠的两个相邻小小区，为所述两个相邻小小区分配相同的物理小区标识分组或在所述两个相邻小小区各自处于开启状态时为所述两个相邻小小区分配相同的物理小区标识。
  24. 根据权利要求16所述的装置，其中，所述物理小区标识复用条件的设置因素包括以下之一：基于小小区簇边缘的用户设备的小区搜索能力；以及基于宏小区的覆盖范围和用户设备的小区搜索能力。
  25. 一种无线通信系统中的方法，所述方法包括：
    接入确定步骤，用于确定用户设备的接入需求；以及
    控制步骤，用于基于所述用户设备的接入需求，将目标小小区从关闭状态转换为开启状态，并且重新为所述目标小小区分配与关闭状态所用的物理小区标识不同的新物理小区标识。
  26. 一种无线通信系统中的方法，所述方法包括：
    判定步骤，用于根据服务小区服务的用户设备对邻近小小区的发现参考信号的测量结果而判定所述用户设备是否需要从所述服务小区接入到 所述邻近小小区中的目标小小区；
    收发步骤，用于在判定需要从所述服务小区接入到所述目标小小区的情况下，向所述目标小小区发送接入请求以及从所述目标小小区接收对所述接入请求的响应；以及
    指示步骤，用于根据所述响应而向所述用户设备发送指示，所述指示包含接入到所述目标小小区的控制信息，以使得所述用户设备根据所述目标小小区的新物理小区标识而接入到所述目标小小区，
    其中，所述目标小小区的新物理小区标识是所述目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
  27. 一种无线通信系统中的方法，所述方法包括：
    收发步骤，用于将用户设备对邻近小小区的发现参考信号的测量结果发送给服务小区，以及从所述服务小区接收关于接入到所述邻近小小区中的目标小小区的接入指示，所述服务小区是当前服务于所述用户设备的小区；以及
    控制步骤，用于基于所述接入指示获取所述目标小小区的新物理小区标识，以根据所述新物理小区标识控制所述用户设备接入到所述目标小小区，
    其中，所述目标小小区的新物理小区标识是所述目标小小区要从关闭状态转换为开启状态时新分配的物理小区标识并且与关闭状态下的物理小区标识不同。
  28. 一种无线通信系统中的方法，所述方法包括：
    分组步骤，用于以预定分组方式根据物理小区标识的值对物理小区标识进行分组；以及
    物理小区标识分配步骤，用于至少根据物理小区标识的分组，基于小小区簇内的各个小小区的开启/关闭状态而动态地为小小区簇内的各个小小区分配物理小区标识，其中，各个小小区关闭状态下的物理小区标识与开启状态下的物理小区标识不同。
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