WO2016090561A1 - 小区重选方法、装置以及通信系统 - Google Patents

小区重选方法、装置以及通信系统 Download PDF

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Publication number
WO2016090561A1
WO2016090561A1 PCT/CN2014/093394 CN2014093394W WO2016090561A1 WO 2016090561 A1 WO2016090561 A1 WO 2016090561A1 CN 2014093394 W CN2014093394 W CN 2014093394W WO 2016090561 A1 WO2016090561 A1 WO 2016090561A1
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WO
WIPO (PCT)
Prior art keywords
cell
short
user equipment
signal strength
service
Prior art date
Application number
PCT/CN2014/093394
Other languages
English (en)
French (fr)
Inventor
吴联海
徐海博
周华
Original Assignee
富士通株式会社
吴联海
徐海博
周华
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社, 吴联海, 徐海博, 周华 filed Critical 富士通株式会社
Priority to JP2017530319A priority Critical patent/JP2017537552A/ja
Priority to KR1020177015857A priority patent/KR20170085073A/ko
Priority to EP14907996.4A priority patent/EP3232714A4/en
Priority to CN201480083258.0A priority patent/CN107079386A/zh
Priority to PCT/CN2014/093394 priority patent/WO2016090561A1/zh
Publication of WO2016090561A1 publication Critical patent/WO2016090561A1/zh
Priority to US15/617,731 priority patent/US20170272989A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0094—Definition of hand-off measurement parameters
    • 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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a cell reselection method, apparatus, and communication system.
  • ProSe Proximity based Services
  • D2D Device to Device
  • the ProSe communication mode means that a data packet does not need to pass through a core network and a base station, and a communication link is directly established between user equipments (for example, UE1 and UE2) to perform communication.
  • the ProSe discovery process is typically performed prior to ProSe communication. For example, before UE1 sends information to UE2 through ProSe communication, it is first found whether UE2 is nearby.
  • 1 is a schematic diagram of ProSe discovery or ProSe communication in the prior art, showing a case where two user equipments (for example, UE1 and UE2) belonging to the same base station (for example, eNB1) perform ProSe discovery or establish ProSe communication.
  • 2 is another schematic diagram of ProSe discovery or communication in the prior art, showing a case where two UEs belonging to different base stations (for example, eNB1 and eNB2) perform ProSe discovery or establish ProSe communication.
  • the UE when the UE is triggered to initiate a discovery procedure (eg, transmitting a discovery signal or receiving a discovery signal), the UE will inform the base station that it is about to perform ProSe discovery and request to allocate ProSe discovery resources. After receiving the request from the UE, the base station will configure the ProSe discovery resource for the UE. The base station may configure the ProSe discovery resource to the UE by using dedicated signaling. It is also possible to notify the UE to directly use the ProSe discovery resource broadcasted in the System Information Block (SIB).
  • SIB System Information Block
  • the UE when the UE is triggered to perform ProSe communication, the UE will inform the base station that it is about to perform ProSe communication and request to allocate ProSe communication resources. After receiving the request from the UE, the base station will configure the ProSe communication resource for the UE. The base station may configure the ProSe communication resource to the UE through Dedicated signaling, and may also notify the UE to directly use the ProSe communication resource broadcasted in the SIB.
  • the user equipment can only perform ProSe service on the carrier (referred to as F1), but not all cells support ProSe service on the carrier F1, that is, a part of the cell on the carrier F1 does not Support for ProSe services.
  • F1 ProSe service on the carrier
  • the user equipment resides in a cell that does not support the ProSe service, if the user equipment is triggered by the upper layer to perform the ProSe service, the user equipment needs to reselect to another cell supporting the ProSe service.
  • the user equipment resides in a carrier that does not support the ProSe service (maybe denoted as f2). If the user equipment is triggered to perform ProSe service, it must reselect to another carrier supporting the ProSe service. Record as f1). Among them, consider the case where the carriers f1 and f2 belong to the same priority.
  • the user equipment sorts all cells of the same priority carrier that meet the S criterion according to the measurement result of the signal strength.
  • the so-called S criterion means that the signal strength of the cell exceeds a predefined threshold. Then, the user equipment reselects to the cell with the strongest signal according to the sorting result. If the cell with the strongest signal does not support ProSe service, the user equipment will not be able to reselect the new cell for ProSe service.
  • Embodiments of the present invention provide a cell reselection method, apparatus, and communication system. Even if the cell with the strongest signal does not support the ProSe service, the user equipment can reselect the new cell to perform the ProSe service.
  • a cell reselection method which is applied to a user equipment that is triggered to perform a short-range service, where the cell reselection method includes:
  • the user equipment is reselected to the cell.
  • a cell reselection apparatus which is configured in a user equipment that is triggered to perform a short-range service, where the cell reselection apparatus includes:
  • a cell determining unit determining a cell that supports short-range traffic and whose signal strength is greater than or equal to a preset threshold
  • a cell reselection unit that reselects the user equipment to the cell.
  • a communication system comprising:
  • the user equipment determines, when triggered for the short-range service, a cell that supports the short-range service and the signal strength is greater than or equal to the preset threshold; and reselects to the cell.
  • a computer readable program wherein when the program is executed in a user equipment, the program causes a computer to perform a cell reselection method as described above in the user equipment .
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a cell reselection method as described above in a user equipment.
  • the user equipment reselects the cell if the cell strength of the cell is greater than or equal to the preset threshold. Thus, even if the cell with the strongest signal does not support the ProSe service, the user equipment can reselect the new cell to perform the ProSe service.
  • FIG. 1 is a schematic diagram of ProSe discovery or communication in the prior art
  • FIG. 3 is a schematic flowchart of a cell reselection method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic flowchart of a cell reselection method according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart of a cell reselection method according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram showing the structure of a cell reselection apparatus according to Embodiment 4 of the present invention.
  • FIG. 7 is a schematic structural diagram of a user equipment according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic diagram of a structure of a cell determining unit according to Embodiment 5 of the present invention.
  • Figure 9 is a block diagram showing the configuration of a communication system according to a seventh embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a cell reselection method according to an embodiment of the present invention. As shown in FIG. 3, the cell reselection method includes:
  • Step 301 The user equipment determines a cell that supports the short-range service and the signal strength is greater than or equal to a preset threshold.
  • step 302 the user equipment reselects to the cell.
  • the cell used for reselection supports the short-range service, and the signal strength of the cell is greater than or equal to a preset threshold. Therefore, even if the cell with the strongest signal does not support the ProSe service, the user equipment can reselect the new cell to perform the ProSe service.
  • the user equipment may be known from the system information sent by the base station.
  • the acquisition of the channel strength of the cell and the determination of the preset threshold may be implemented in a related manner in the prior art.
  • the user equipment in a case where a cell supports a short-distance service and the signal strength of the cell is greater than or equal to a preset threshold, the user equipment reselects the cell.
  • the user equipment can reselect the new cell to perform the ProSe service.
  • the ordering may be ignored.
  • the user equipment may reselect the cell; or the signal strength of the cell supporting the short-distance service may be sorted, and the user equipment may be heavy. Select the cell that supports the near-field service and has the strongest signal strength.
  • the embodiment of the present invention further describes the cell reselection method based on the first embodiment.
  • the user equipment is in an idle state and resides in the cell before determining the cell for reselection.
  • a cell eg, cell1 that does not support near-field traffic (such as ProSe discovery or ProSe communication).
  • the carrier where the cell is located may be referred to as F1, and one or more cells (for example, only a part of cells) support ProSe service on the carrier F1.
  • FIG. 4 is a schematic flowchart of a cell reselection method according to an embodiment of the present invention. As shown in FIG. 4, the method includes:
  • Step 401 The user equipment receives system information sent by the base station.
  • the system information includes: cell information supporting short-range services and/or carrier information supporting short-distance services. For example, whether the local cell (for example, cell1) supports the ProSe service, and whether the neighboring cell (for example, cell2, cell3) supports the ProSe service.
  • cell information supporting short-range services For example, whether the local cell (for example, cell1) supports the ProSe service, and whether the neighboring cell (for example, cell2, cell3) supports the ProSe service.
  • Step 402 The user equipment is triggered to perform a ProSe service.
  • the user equipment may be triggered by a higher layer to send a ProSe discovery signal, receive a ProSe discovery signal, or perform ProSe communication or the like.
  • the present invention is not limited thereto, and may be any one of the methods in which the ProSe service is triggered in the prior art.
  • Step 403 The user equipment determines a certain cell used for reselection from multiple cells of the same carrier.
  • the cell is determined to be reselected. Community.
  • all the cells on the carrier F1 include cell1, cell2, cell3, cell4, cell5, and cell6, and the cell that supports the ProSe service and whose signal strength is greater than the preset threshold includes: cell2, cell5, and cell6, if the user equipment is When the ProSe service is triggered, the user equipment will reselect to any of the cells cell2, cell5 and cell6.
  • the user equipment reselects to the cell. That is, the user equipment ignores the RANK criterion when performing the cell reselection procedure. Thereby, the new cell can be reselected for ProSe service.
  • the multiple cells are classified into a cell supporting short-range traffic and a cell not supporting short-range traffic; for the one or more supporting the near-distance service a cell, the cells whose signal strength is greater than or equal to the preset threshold are sorted according to signal strength; and the cell that performs reselection is determined according to the sorted result.
  • the cell with the strongest signal strength after sorting may be determined as the cell for performing reselection. But this hair
  • the present invention is not limited thereto, and for example, a cell having the second strongest signal strength may be determined as a cell for performing reselection.
  • Class A cells support ProSe services (for example, Class A cells include cell2, cell4, cell5, cell6, etc.), and Class B cells do not support ProSe (for example, Class B cells include cell1, cell3, etc.).
  • the user equipment sorts all the cells (for example, cell2, cell5, and cell6) whose signal strength is greater than a certain threshold in the class A cell according to the signal strength, and the sorted result is, for example, cell5, cell2, and cell6. Then, if the user equipment is triggered to perform ProSe service, the user equipment will reselect to the cell 5 with the strongest signal in the class A cell.
  • the cells for example, cell2, cell5, and cell6
  • a plurality of cells supporting the ProSe service and having a signal strength higher than a preset threshold are sorted, and the cell is reselected according to the ranking result. Thereby, the new cell with good signal strength can be reselected to perform ProSe service.
  • Step 404 The user equipment reselects the cell supporting the ProSe service, and starts the ProSe service.
  • the user equipment if the user equipment is in an idle state and resides in a cell that does not support the ProSe service, only a part of the cell supports the ProSe service on the same carrier, and if the user equipment is triggered to perform the ProSe service, When the cell supports the short-range service and the signal strength of the cell is greater than or equal to a preset threshold, the user equipment reselects the cell. Thus, even if the cell with the strongest signal does not support the ProSe service, the user equipment can reselect the new cell to perform the ProSe service.
  • the embodiment of the present invention further describes the cell reselection method based on the first embodiment.
  • the user equipment before determining the cell for reselection, the user equipment is in an idle state and camps on a cell (eg, cell 1) that does not support proximity services (eg, ProSe discovery or ProSe communication).
  • the carrier where the cell is located may be denoted as f2, and the carrier f2 does not support the ProSe service; the other carrier (denoted as f1) supports the ProSe service; and in the cell reselection criterion, f1 and f2 are at the same priority.
  • the carrier f1 only some cells may support ProSe services, or all cells may support ProSe services.
  • FIG. 5 is a schematic flowchart of a cell reselection method according to an embodiment of the present invention. As shown in FIG. 5, the method includes:
  • Step 501 The user equipment receives system information sent by the base station.
  • the system information includes: cell information supporting short-distance services and/or supporting short-distance services.
  • Carrier information For example, whether the local cell (for example, cell1) supports the ProSe service, whether the neighboring cell (for example, cell2, cell3) supports the ProSe service; and/or, which carriers support the ProSe service, which carriers do not support the ProSe service, and the like.
  • Step 502 The user equipment is triggered to perform a ProSe service.
  • the user equipment is triggered by the upper layer to send a ProSe discovery signal, receive a ProSe discovery signal, or ProSe communication or the like.
  • Step 503 The user equipment determines a cell for performing reselection from multiple cells on multiple carriers of the same priority.
  • the cell is determined.
  • a cell for reselection when a cell supports short-range traffic and the signal strength of the cell is greater than or equal to the preset threshold, the cell is determined. A cell for reselection.
  • all cells on the carrier f2 include cell1, cell2, cell3, etc.
  • all cells on the carrier f1 include cell4, cell5, and cell6.
  • the cell that supports the ProSe service and the signal strength is greater than the preset threshold includes: cell5 and cell6. If the user equipment is triggered to perform the ProSe service, the user equipment reselects to any one of the cells cell5 and cell6.
  • the user equipment reselects to the cell. That is, the user equipment ignores the RANK criterion when performing the cell reselection procedure. Thereby, the new cell can be reselected for ProSe service.
  • the multiple cells are classified into a cell supporting short-range traffic and a cell not supporting short-range traffic for multiple cells on multiple carriers of the same priority; a cell of the service, the cells whose signal strength is greater than or equal to the preset threshold are sorted according to signal strength; and the cell that performs reselection is determined according to the sorted result.
  • the cell with the strongest signal strength after sorting may be determined as the cell for performing reselection.
  • the present invention is not limited thereto.
  • a cell having the second strongest signal strength may be determined as a cell for reselection.
  • Class A cells support ProSe services (including, for example, cell4, cell5, and cell6)
  • class B cells do not support ProSe services (including, for example, cell1, cell2, cell3, etc.).
  • the user equipment sorts all the cells (for example, cell5 and cell6) whose signal strength is greater than a certain threshold in the class A cell according to the signal strength, and the sorted result is, for example, cell6 and cell5. Then If the user equipment is triggered to perform ProSe service, the user equipment will reselect to the cell 6 with the strongest signal in the class A cell.
  • a plurality of cells supporting the ProSe service and having a signal strength higher than a preset threshold are sorted, and the cell is reselected according to the ranking result. Thereby, the new cell with good signal strength can be reselected to perform ProSe service.
  • step 504 the user equipment reselects the cell supporting the ProSe and starts the ProSe service.
  • the user equipment if the user equipment is in an idle state and resides in a cell that does not support the ProSe service, only a part of the cells of the same priority support the ProSe service, if the user equipment is triggered to perform the ProSe service. If the cell strength of the cell is greater than or equal to the preset threshold, the user equipment reselects the cell. Thus, even if the cell with the strongest signal does not support the ProSe service, the user equipment can reselect the new cell to perform the ProSe service.
  • the embodiment of the invention provides a cell reselection device, which is configured in a user equipment that is triggered to perform short-distance service.
  • the embodiment of the present invention corresponds to the cell reselection method in Embodiment 1, and the same content is not described herein again.
  • FIG. 6 is a schematic diagram of a structure of a cell reselection apparatus according to an embodiment of the present invention. As shown in FIG. 6, the cell reselection apparatus 600 includes:
  • the cell determining unit 601 determines a cell that supports short-range traffic and whose signal strength is greater than or equal to a preset threshold
  • the cell reselecting unit 602 reselects the user equipment to the cell.
  • the embodiment of the invention further provides a user equipment, which is configured with the above-mentioned cell reselection device 600.
  • FIG. 7 is a schematic block diagram showing a system configuration of a user equipment according to an embodiment of the present invention.
  • the user device 700 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the functionality of the cell reselection device 600 can be integrated into the central processor 100.
  • the central processing unit 100 can be configured to implement the methods as described in the embodiments 1 to 3.
  • the cell reselection device 600 can be configured separately from the central processing unit 100.
  • the cell reselection device 600 can be configured as a chip connected to the central processing unit 100, and controlled by the central processing unit. The function of the cell reselection device 600 is implemented.
  • the user equipment 700 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a display 160, and a power source 170. It should be noted that the user equipment 700 does not have to include all the components shown in FIG. 7; in addition, the user equipment 700 may further include components not shown in FIG. 7, and reference may be made to the prior art.
  • central processor 100 also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls various aspects of user device 700. The operation of the part.
  • the memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. Information related to failures can be stored, and programs for performing related information can be stored. And the central processing unit 100 can execute the program stored by the memory 140 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here.
  • the various components of user device 700 may be implemented by special purpose hardware, firmware, software, or a combination thereof without departing from the scope of the invention.
  • the user equipment in a case where a cell supports a short-distance service and the signal strength of the cell is greater than or equal to a preset threshold, the user equipment reselects the cell.
  • the user equipment can reselect the new cell to perform the ProSe service.
  • a cell reselection device is configured in a user equipment that is triggered to perform a short-distance service, and is further described on the basis of Embodiment 4.
  • the embodiment of the present invention corresponds to the cell reselection method in Embodiment 2, and the same content is not described again.
  • the user equipment is in an idle state and resides in a cell that does not support the ProSe service. Only a part of the cells on the same carrier support the ProSe service.
  • the cell determining unit 601 for a plurality of cells on the same carrier, when the cell supports the short-range service and the signal strength of the cell is greater than or equal to the preset threshold, the cell determining unit 601 A cell determined to be reselected is determined.
  • the cell determining unit also sorts the cells.
  • FIG. 8 is a schematic structural diagram of a cell determining unit according to an embodiment of the present invention. As shown in FIG.
  • the determining unit 601 can include:
  • the classifying unit 801 classifies the plurality of cells into a cell supporting a short-range service and a cell not supporting a short-distance service, for multiple cells on the same carrier;
  • the sorting unit 802 for the cell supporting the short-distance service, sort the cells whose signal strength is greater than or equal to the preset threshold according to the signal strength;
  • the result determining unit 803 determines the cell to be reselected based on the sorted result.
  • the result determining unit 803 is specifically configured to: determine, as the cell to be reselected, the cell with the strongest signal strength after sorting.
  • the user equipment if the user equipment is in an idle state and resides in a cell that does not support the ProSe service, only a part of the cell supports the ProSe service on the same carrier, and if the user equipment is triggered to perform the ProSe service, When the cell supports the short-range service and the signal strength of the cell is greater than or equal to a preset threshold, the user equipment reselects the cell. Thus, even if the cell with the strongest signal does not support the ProSe service, the user equipment can reselect the new cell to perform the ProSe service.
  • a cell reselection device is configured in a user equipment that is triggered to perform a short-distance service, and is further described on the basis of Embodiment 4.
  • the embodiment of the present invention corresponds to the cell reselection method in Embodiment 3, and the same content is not described herein again.
  • the user equipment is in an idle state and resides in a cell that does not support the ProSe service. Only a part of the cells of the same priority support the ProSe service.
  • the cell determining unit 601 supports a short-distance service in a certain cell and a signal strength of the cell is greater than or equal to the preset threshold for multiple cells on multiple carriers of the same priority. And determining the cell as the cell for performing reselection.
  • the cell determining unit 601 also sorts the cells. As shown in FIG. 8, the cell determining unit 601 may include: a classifying unit 801, a sorting unit 802, and a result determining unit 803;
  • the classification unit 801 classifies the multiple cells into cells supporting short-range services and cells not supporting short-distance services for multiple cells on multiple carriers of the same priority;
  • the cell supporting the short-distance service sorts the cells whose signal strength is greater than or equal to the preset threshold according to the signal strength;
  • the result determining unit 803 determines the cell to be reselected according to the sorted result.
  • the result determining unit 803 is specifically configured to: determine, as the cell to be reselected, the cell with the strongest signal strength after sorting.
  • the user equipment if the user equipment is in an idle state and resides in a cell that does not support the ProSe service, only a part of the cells of the same priority support the ProSe service, if the user equipment is triggered to perform the ProSe service. If the cell strength of the cell is greater than or equal to the preset threshold, the user equipment reselects the cell. Thus, even if the cell with the strongest signal does not support the ProSe service, the user equipment can reselect the new cell to perform the ProSe service.
  • FIG. 9 is a schematic diagram of a structure of a communication system according to an embodiment of the invention.
  • the communication system 900 includes a user equipment 901.
  • the user equipment 901 determines a cell that supports the short-range service and the signal strength is greater than or equal to the preset threshold; and reselects to the cell.
  • the user equipment 901 is in an idle state before camping and residing in a cell that does not support short-range services, where one or more cells (eg, only partial cells) on the same carrier support ProSe services; Or the user equipment 901 is in an idle state before camping and residing in a cell that does not support short-range services, where one or more cells on multiple carriers of the same priority support ProSe services; for example, only one carrier Some cells support ProSe services, or all cells on the carrier support ProSe services.
  • the communication system 900 can further include:
  • the base station 902 sends system information to the user equipment 901, where the system information includes: cell information supporting short-range services and/or carrier information supporting short-range services.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to execute the cell reselection method described in Embodiments 1 to 3 in the user equipment.
  • An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the cell reselection method described in Embodiments 1 to 3 in a user equipment.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

一种小区重选方法、装置以及通信系统，所述小区重选方法包括：用户设备确定一支持近距离业务且信号强度大于或等于预设阈值的小区；所述用户设备重选到所述小区。通过本发明实施例，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。

Description

小区重选方法、装置以及通信系统 技术领域
本发明涉及一种通信技术领域，特别涉及一种小区重选方法，装置以及通信系统。
背景技术
近距离业务(ProSe，Proximity based Services)也可称为设备到设备(D2D，Device to Device)业务，目前已经被广泛地研究。ProSe通信方式是指数据包无需通过核心网和基站，在用户设备(例如UE1和UE2)之间直接建立通信链路而进行通信。在进行ProSe通信前，一般会进行ProSe发现过程。例如，UE1要通过ProSe通信方式发信息给UE2之前，先要发现UE2是否在附近。
图1是现有技术中ProSe发现或ProSe通信的一示意图，示出了属于同一个基站(例如eNB1)的两个用户设备(例如UE1和UE2)进行ProSe发现或建立ProSe通信的情况。图2是现有技术中ProSe发现或通信的另一示意图，示出了属于不同基站(例如eNB1和eNB2)的两个UE进行ProSe发现或建立ProSe通信的情况。
对于UE的ProSe发现过程，当UE被触发启动发现程序(例如发送发现信号或者接收发现信号)时，UE将通知基站，其即将进行ProSe发现并要求分配ProSe发现资源。基站收到来自UE的请求后，将会给UE配置ProSe发现资源。基站可能通过专用信令(Dedicated signaling)给UE配置ProSe发现资源，也有可能通知UE直接使用系统信息块(SIB，System Information Block)中广播的ProSe发现资源。
同样地，当UE被触发需要进行ProSe通信时，UE将通知基站，其即将进行ProSe通信并要求分配ProSe通信资源。基站收到来自UE的请求后，将会给UE配置ProSe通信资源。基站可能通过专用信令(Dedicated signaling)给UE配置ProSe通信资源，也有可能通知UE直接使用SIB中广播的ProSe通信资源。
应该注意，上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
目前，在一种场景下考虑用户设备只能在载波(记作F1)上进行ProSe业务，但在该载波F1上并非所有的小区都支持ProSe业务，即有一部分在载波F1上的小区并不支持ProSe业务。当用户设备驻留在某个不支持ProSe业务的小区时，如果该用户设备被高层触发进行ProSe业务，此时，用户设备需要重选到另一个支持ProSe业务的小区。
在另一种场景下考虑用户设备驻留在一个不支持ProSe业务的载波(不妨记为f2)，如果该用户设备被触发进行ProSe业务，则必须重选到另一个支持ProSe业务的载波(不妨记为f1)。其中，考虑载波f1和f2属于同一个优先级的情况。
但是，发明人发现对于以上两个场景，根据现有的小区重选机制，用户设备根据信号强度的测量结果，会把所有符合S准则的同一优先级载波的小区进行排序。所谓S准则是指：小区的信号强度超过预先定义的阈值。然后，用户设备会根据排序结果，重选到信号最强的一个小区。如果信号最强的那个小区不支持ProSe业务，则该用户设备将无法重选到新小区进行ProSe业务。
本发明实施例提供一种小区重选方法、装置以及通信系统。即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
根据本发明实施例的第一个方面，提供一种小区重选方法，应用于被触发进行近距离业务的用户设备，所述小区重选方法包括：
所述用户设备确定一支持近距离业务且信号强度大于或等于预设阈值的小区；
所述用户设备重选到所述小区。
根据本发明实施例的第二个方面，提供一种小区重选装置，配置于被触发进行近距离业务的用户设备中，所述小区重选装置包括：
小区确定单元，确定一支持近距离业务且信号强度大于或等于预设阈值的小区；
小区重选单元，将所述用户设备重选到所述小区。
据本发明实施例的第三个方面，提供一种通信系统，所述通信系统包括：
用户设备，在被触发进行近距离业务时确定一支持近距离业务且信号强度大于或等于预设阈值的小区；以及重选到所述小区。
根据本发明实施例的又一个方面，提供一种计算机可读程序，其中当在用户设备中执行所述程序时，所述程序使得计算机在所述用户设备中执行如上所述的小区重选方法。
根据本发明实施例的又一个方面，提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在用户设备中执行如上所述的小区重选方法。
本发明实施例的有益效果在于，在某一小区支持近距离业务且所述小区的信号强度大于或等于预设阈值的情况下，用户设备重选所述小区。由此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原理可以被采用的方式。应该理解，本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘制的，而只是为了示出本发明的原理。为了便于示出和描述本发明的一些部分，附图中对应部分可能被放大或缩小。
在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是现有技术中ProSe发现或通信的一示意图；
图2是现有技术中ProSe发现或通信的另一示意图；
图3是本发明实施例1的小区重选方法的一流程示意图；
图4是本发明实施例2的小区重选方法的一流程示意图；
图5是本发明实施例3的小区重选方法的一流程示意图；
图6是本发明实施例4的小区重选装置的一构成示意图；
图7是本发明实施例4的用户设备的一构成示意图；
图8是本发明实施例5的小区确定单元的一构成示意图；
图9是本发明实施例7的通信系统的一构成示意图。
具体实施方式
参照附图，通过下面的说明书，本发明的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本发明的特定实施方式，其表明了其中可以采用本发明的原则的部分实施方式，应了解的是，本发明不限于所描述的实施方式，相反，本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。
实施例1
本发明实施例提供一种小区重选方法，应用于被触发进行ProSe业务的用户设备。图3是本发明实施例的小区重选方法的一流程示意图，如图3所示，所述小区重选方法包括：
步骤301，用户设备确定某一支持近距离业务且信号强度大于或等于预设阈值的小区；
步骤302，用户设备重选到所述小区。
在本实施例中，用于进行重选的小区支持近距离业务，并且该小区的信号强度大于或等于预设阈值。因此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
在本实施例中，关于小区是否支持ProSe业务的信息，用户设备可以从基站发送的系统信息中获知。此外，关于小区的信道强度的获取以及预设阈值的确定，可以采用现有技术中的相关方式实现。
由上述实施例可知，在某一小区支持近距离业务且所述小区的信号强度大于或等于预设阈值的情况下，用户设备重选所述小区。由此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
即，用户设备进行小区重选时，可以忽略排序，只要该小区符合S准则，用户设备就可以重选到该小区；也可以对支持近距离业务的小区的信号强度进行排序，用户设备可以重选到支持近距离业务且信号强度最强的小区。
实施例2
本发明实施例在实施例1的基础上，对于小区重选方法进行进一步说明。
在本实施例中，在确定用于进行重选的小区之前，用户设备处于空闲态且驻留在 一个不支持近距离业务(例如ProSe发现或者ProSe通信)的小区(例如cell1)。其中不妨将该小区所在的载波记为F1，在该载波F1上一个或多个小区(例如只有部分小区)支持ProSe业务。
图4是本发明实施例的小区重选方法的一流程示意图。如图4所示，所述方法包括：
步骤401，用户设备接收基站发送的系统信息；
其中，所述系统信息包括：支持近距离业务的小区信息和/或支持近距离业务的载波信息。例如，本小区(例如cell1)是否支持ProSe业务，邻小区(例如cell2，cell3)是否支持ProSe业务。
步骤402，用户设备被触发进行ProSe业务；
例如，用户设备可能被高层触发发送ProSe发现信号、接收ProSe发现信号或者进行ProSe通信等。但本发明不限于此，可以为现有技术中ProSe业务被触发的任意一种方式。
步骤403，用户设备从同一载波的多个小区中确定某一用于进行重选的小区。
在一个实施方式中，对于同一载波上的多个小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，将所述小区确定为进行重选的小区。
例如，在载波F1上的所有小区包括cell1，cell2，cell3，cell4，cell5，cell6等，其中支持ProSe业务且信号强度大于预设阈值的小区包括：cell2，cell5，cell6，则如果该用户设备被触发进行ProSe业务，用户设备将重选到小区cell2，cell5和cell6中的任何一个。
在本实施方式中，只要某个支持ProSe业务的小区的信号强度高于某个预先给定的阈值，该用户设备就重选到该小区。即，用户设备进行小区重选过程时忽略排序(RANK)准则。由此，可以重选到新小区进行ProSe业务。
在另一个实施方式中，对于同一载波上的多个小区，将所述多个小区分类为支持近距离业务的小区和不支持近距离业务的小区；对于所述支持近距离业务的一个或多个小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；以及根据排序后的结果确定所述进行重选的小区。
其中，可以将排序后的信号强度最强的小区确定为所述进行重选的小区。但本发 明不限于此，例如也可以将信号强度第二强的小区确定为进行重选的小区。
例如，在载波F1上的所有小区被分为两类，不妨记为A类和B类。A类小区支持ProSe业务(例如A类小区包括cell2，cell4，cell5，cell6等)，B类小区不支持ProSe(例如B类小区包括cell1，cell3等)。
然后，用户设备将对A类小区中信号强度大于某个阈值的所有小区(例如包括cell2，cell5，cell6)按照信号强度分别进行排序，排序后的结果例如为cell5，cell2，cell6。则如果该用户设备被触发进行ProSe业务，用户设备将重选到A类小区中信号最强的小区cell5。
在本实施方式中，对支持ProSe业务且信号强度高于预设阈值的多个小区进行排序，根据排序结果重选小区。由此，可以重选到信号强度较好的新小区来进行ProSe业务。
步骤404，用户设备重选到支持ProSe业务的小区，并开始进行ProSe业务。
由上述实施例可知，对于用户设备处于空闲态且驻留在一个不支持ProSe业务的小区，同一载波上只有部分小区支持ProSe业务的情况，若该用户设备被触发进行ProSe业务，则在某一小区支持近距离业务且所述小区的信号强度大于或等于预设阈值的情况下，用户设备重选所述小区。由此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
实施例3
本发明实施例在实施例1的基础上，对于小区重选方法进行进一步说明。
在本实施例中，在确定用于进行重选的小区之前，用户设备处于空闲态且驻留在不支持近距离业务(例如ProSe发现或者ProSe通信)的小区(例如cell1)。其中不妨将该小区所在的载波记为f2，且该载波f2不支持ProSe业务；另一个载波(记为f1)支持ProSe业务；且在小区重选准则中，f1和f2处于同一优先级。在该载波f1上，可以只有部分小区支持ProSe业务，或者也可以全部小区支持ProSe业务。
图5是本发明实施例的小区重选方法的一流程示意图。如图5所示，所述方法包括：
步骤501，用户设备接收基站发送的系统信息；
其中，所述系统信息包括：支持近距离业务的小区信息和/或支持近距离业务的 载波信息。例如，本小区(例如cell1)是否支持ProSe业务，邻小区(例如cell2，cell3)是否支持ProSe业务；和/或，哪些载波支持ProSe业务，哪些载波不支持ProSe业务等等。
步骤502，用户设备被触发进行ProSe业务；
例如，用户设备被高层触发发送ProSe发现信号、接收到ProSe发现信号或者ProSe通信等。
步骤503，用户设备从同一优先级的多个载波上的多个小区中确定某一用于进行重选的小区。
在一个实施方式中，对于同一优先级的多个载波上的多个小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，将所述小区确定为进行重选的小区。
例如，在载波f2上的所有小区包括cell1，cell2，cell3等，在载波f1上的所有小区包括cell4，cell5，cell6。其中支持ProSe业务且信号强度大于预设阈值的小区包括：cell5和cell6，则如果该用户设备被触发进行ProSe业务，用户设备将重选到小区cell5和cell6中的任何一个小区。
在本实施方式中，只要某个支持ProSe业务的小区的信号强度高于某个预先给定的阈值，该用户设备就重选到该小区。即，用户设备进行小区重选过程时忽略排序(RANK)准则。由此，可以重选到新小区进行ProSe业务。
在另一个实施方式中，对于同一优先级的多个载波上的多个小区，将所述多个小区分类为支持近距离业务的小区和不支持近距离业务的小区；对于所述支持近距离业务的小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；以及根据排序后的结果确定所述进行重选的小区。
其中，可以将排序后的信号强度最强的小区确定为所述进行重选的小区。但本发明不限于此，例如也可以将信号强度第二强的小区确定为进行重选的小区。
例如，在载波f1和f2上的所有小区被分为两类，不妨记为A类和B类。A类小区支持ProSe业务(例如包括cell4，cell5，cell6等)，B类小区不支持ProSe业务(例如包括cell1，cell2，cell3等)。
然后，用户设备将对A类小区中信号强度大于某个阈值的所有小区(例如包括cell5和cell6)按照信号强度分别进行排序，排序后的结果例如为cell6，cell5。则 如果该用户设备被触发进行ProSe业务，用户设备将重选到A类小区中信号最强的小区cell 6。
在本实施方式中，对支持ProSe业务且信号强度高于预设阈值的多个小区进行排序，根据排序结果重选小区。由此，可以重选到信号强度较好的新小区来进行ProSe业务。
步骤504，用户设备重选到支持ProSe的小区，并开始进行ProSe业务。
由上述实施例可知，对于用户设备处于空闲态且驻留在一个不支持ProSe业务的小区，同一优先级的多个载波上只有部分小区支持ProSe业务的情况，若该用户设备被触发进行ProSe业务，则在某一小区支持近距离业务且所述小区的信号强度大于或等于预设阈值的情况下，用户设备重选所述小区。由此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
实施例4
本发明实施例提供一种小区重选装置，配置于被触发进行近距离业务的用户设备中。本发明实施例对应于实施例1中的小区重选方法，相同的内容不再赘述。
图6是本发明实施例的小区重选装置的一构成示意图，如图6所示，所述小区重选装置600包括：
小区确定单元601，确定一支持近距离业务且信号强度大于或等于预设阈值的小区；
小区重选单元602，将所述用户设备重选到所述小区。
本发明实施例还提供一种用户设备，配置有上述的小区重选装置600。
图7是本发明实施例的用户设备的系统构成的一示意框图。如图7所示，该用户设备700可以包括中央处理器100和存储器140；存储器140耦合到中央处理器100。值得注意的是，该图是示例性的；还可以使用其他类型的结构，来补充或代替该结构，以实现电信功能或其他功能。
在一个实施方式中，小区重选装置600的功能可以被集成到中央处理器100中。其中，中央处理器100可以被配置为实现如实施例1至3所述的方法。
在另一个实施方式中，小区重选装置600可以与中央处理器100分开配置，例如可以将小区重选装置600配置为与中央处理器100连接的芯片，通过中央处理器的控 制来实现小区重选装置600的功能。
如图7所示，该用户设备700还可以包括：通信模块110、输入单元120、音频处理单元130、显示器160、电源170。值得注意的是，用户设备700也并不是必须要包括图7中所示的所有部件；此外，用户设备700还可以包括图7中没有示出的部件，可以参考现有技术。
如图7所示，中央处理器100有时也称为控制器或操作控件，可以包括微处理器或其他处理器装置和/或逻辑装置，该中央处理器100接收输入并控制用户设备700的各个部件的操作。
其中，存储器140，例如可以是缓存器、闪存、硬驱、可移动介质、易失性存储器、非易失性存储器或其它合适装置中的一种或更多种。可储存与失败有关的信息，此外还可存储执行有关信息的程序。并且中央处理器100可执行该存储器140存储的该程序，以实现信息存储或处理等。其他部件的功能与现有类似，此处不再赘述。用户设备700的各部件可以通过专用硬件、固件、软件或其结合来实现，而不偏离本发明的范围。
由上述实施例可知，在某一小区支持近距离业务且所述小区的信号强度大于或等于预设阈值的情况下，用户设备重选所述小区。由此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
实施例5
本发明实施例一种小区重选装置，配置于被触发进行近距离业务的用户设备中，在实施例4的基础上进一步说明。本发明实施例对应于实施例2中的小区重选方法，相同的内容不再赘述。
在本实施例中，用户设备处于空闲态且驻留在一个不支持ProSe业务的小区，同一载波上只有部分小区支持ProSe业务。
在一个实施方式中，所述小区确定单元601对于同一载波上的多个小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，将所述小区确定为所述进行重选的小区。
在另一个实施方式中，小区确定单元还对各小区进行排序。
图8是本发明实施例的小区确定单元的一构成示意图，如图8所示，所述小区确 定单元601可以包括：
分类单元801，对于同一载波上的多个小区，将所述多个小区分类为支持近距离业务的小区和不支持近距离业务的小区；
排序单元802，对于所述支持近距离业务的小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；
结果确定单元803，根据排序后的结果确定所述进行重选的小区。
其中，所述结果确定单元803具体可以用于：将排序后的信号强度最强的小区确定为所述进行重选的小区。
由上述实施例可知，对于用户设备处于空闲态且驻留在一个不支持ProSe业务的小区，同一载波上只有部分小区支持ProSe业务的情况，若该用户设备被触发进行ProSe业务，则在某一小区支持近距离业务且所述小区的信号强度大于或等于预设阈值的情况下，用户设备重选所述小区。由此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
实施例6
本发明实施例一种小区重选装置，配置于被触发进行近距离业务的用户设备中，在实施例4的基础上进一步说明。本发明实施例对应于实施例3中的小区重选方法，相同的内容不再赘述。
在本实施例中，用户设备处于空闲态且驻留在一个不支持ProSe业务的小区，同一优先级的多个载波上只有部分小区支持ProSe业务。
在一个实施方式中，所述小区确定单元601对于同一优先级的多个载波上的多个小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，将所述小区确定为所述进行重选的小区。
在另一个实施方式中，小区确定单元601还对各小区进行排序。如图8所示，所述小区确定单元601可以包括：分类单元801，排序单元802和结果确定单元803；
在本实施方式中，分类单元801对于同一优先级的多个载波上的多个小区，将所述多个小区分类为支持近距离业务的小区和不支持近距离业务的小区；排序单元802对于所述支持近距离业务的小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；结果确定单元803根据排序后的结果确定所述进行重选的小区。
其中，所述结果确定单元803具体可以用于：将排序后的信号强度最强的小区确定为所述进行重选的小区。
由上述实施例可知，对于用户设备处于空闲态且驻留在一个不支持ProSe业务的小区，同一优先级的多个载波上只有部分小区支持ProSe业务的情况，若该用户设备被触发进行ProSe业务，则在某一小区支持近距离业务且所述小区的信号强度大于或等于预设阈值的情况下，用户设备重选所述小区。由此，即使信号最强的小区不支持ProSe业务，用户设备也可以重选到新小区进行ProSe业务。
实施例7
本发明实施例提供一种通信系统，图9是本发明实施例的通信系统的一构成示意图。如图9所示，该通信系统900包括用户设备901。
其中，用户设备901在被触发进行近距离业务时，确定一支持近距离业务且信号强度大于或等于预设阈值的小区；以及重选到所述小区。
在本实施例中，所述用户设备901在进行重选之前处于空闲态并且驻留在不支持近距离业务的小区，其中同一载波上一个或多个小区(例如只有部分小区)支持ProSe业务；或者所述用户设备901在进行重选之前处于空闲态并且驻留在不支持近距离业务的小区，其中同一优先级的多个载波上一个或多个小区支持ProSe业务；例如某一载波上只有部分小区支持ProSe业务，或者该载波上的全部小区支持ProSe业务。
如图9所示，所述通信系统900还可以包括：
基站902，向所述用户设备901发送系统信息，其中所述系统信息包括：支持近距离业务的小区信息和/或支持近距离业务的载波信息。
本发明实施例还提供一种计算机可读程序，其中当在用户设备中执行所述程序时，所述程序使得计算机在所述用户设备中执行实施例1至3所述的小区重选方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在用户设备中执行实施例1至3所述的小区重选方法。
本发明以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。本发明还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的精神和原理对本发明做出各种变型和修改，这些变型和修改也在本发明的范围内。

Claims (20)

  1. 一种小区重选方法，应用于被触发进行近距离业务的用户设备，所述小区重选方法包括：
    所述用户设备确定一支持近距离业务且信号强度大于或等于预设阈值的小区；
    所述用户设备重选到所述小区。
  2. 根据权利要求1所述的小区重选方法，其中，在确定所述小区之前，所述用户设备处于空闲态且驻留在不支持近距离业务的小区；其中驻留的小区所在的载波上的一个或多个小区支持近距离业务。
  3. 根据权利要求2所述的小区重选方法，其中，所述用户设备确定一支持近距离业务且信号强度大于或等于预设阈值的小区包括：
    对于同一载波上的小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，所述用户设备将所述某一小区确定为进行重选的所述小区。
  4. 根据权利要求2所述的小区重选方法，其中，所述用户设备确定一支持近距离业务且信号强度大于或等于预设阈值的小区包括：
    对于同一载波上的小区，将所述小区分类为支持近距离业务的小区和不支持近距离业务的小区；
    对于所述支持近距离业务的小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；
    根据排序后的结果确定进行重选的所述小区。
  5. 根据权利要求4所述的小区重选方法，其中，将排序后的信号强度最强的小区确定为进行重选的所述小区。
  6. 根据权利要求1所述的小区重选方法，其中，在确定所述小区之前，所述用户设备处于空闲态且驻留在不支持近距离业务的小区；其中与驻留的小区所在的载波具有相同优先级的载波上的部分小区或者全部小区支持近距离业务。
  7. 根据权利要求6所述的小区重选方法，其中，所述用户设备确定一支持近距离业务且信号强度大于或等于预设阈值的小区包括：
    对于具有同一优先级的多个载波上的小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，所述用户设备将所述某一小区确定为进行 重选的所述小区。
  8. 根据权利要求6所述的小区重选方法，其中，所述用户设备确定一支持近距离业务且信号强度大于或等于预设阈值的小区包括：
    对于具有同一优先级的多个载波上的小区，将所述小区分类为支持近距离业务的小区和不支持近距离业务的小区；
    对于所述支持近距离业务的小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；
    根据排序后的结果确定进行重选的所述小区。
  9. 根据权利要求8所述的小区重选方法，其中，将排序后的信号强度最强的小区确定为进行重选的所述小区。
  10. 根据权利要求1所述的小区重选方法，其中，在确定所述小区之前，所述方法还包括：
    所述用户设备接收系统信息，其中所述系统信息包括：支持近距离业务的小区信息和/或支持近距离业务的载波信息。
  11. 一种小区重选装置，配置于被触发进行近距离业务的用户设备中，所述小区重选装置包括：
    小区确定单元，确定一支持近距离业务且信号强度大于或等于预设阈值的小区；
    小区重选单元，将所述用户设备重选到所述小区。
  12. 根据权利要求11所述的小区重选装置，其中，所述小区确定单元对于同一载波上的小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，将所述小区确定为进行重选的所述小区。
  13. 根据权利要求11所述的小区重选装置，其中，所述小区确定单元包括：
    分类单元，对于同一载波上的小区，将所述小区分类为支持近距离业务的小区和不支持近距离业务的小区；
    排序单元，对于所述支持近距离业务的小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；
    结果确定单元，根据排序后的结果确定进行重选的所述小区。
  14. 根据权利要求13所述的小区重选装置，其中，所述结果确定单元将排序后的信号强度最强的小区确定为进行重选的所述小区。
  15. 根据权利要求11所述的小区重选装置，其中，所述小区确定单元对于具有同一优先级的多个载波上的小区，在某一小区支持近距离业务且所述小区的信号强度大于或等于所述预设阈值时，将所述小区确定为进行重选的所述小区。
  16. 根据权利要求11所述的小区重选装置，其中，所述小区确定单元包括：
    分类单元，对于具有同一优先级的多个载波上的小区，将所述小区分类为支持近距离业务的小区和不支持近距离业务的小区；
    排序单元，对于所述支持近距离业务的小区，将信号强度大于或等于所述预设阈值的小区按照信号强度进行排序；
    结果确定单元，根据排序后的结果确定进行重选的所述小区。
  17. 根据权利要求16所述的小区重选装置，其中，所述结果确定单元将排序后的信号强度最强的小区确定为进行重选的所述小区。
  18. 一种通信系统，所述通信系统包括：
    用户设备，在被触发进行近距离业务时确定一支持近距离业务且信号强度大于或等于预设阈值的小区；以及重选到所述小区。
  19. 根据权利要求18所述的通信系统，其中，所述用户设备在进行重选之前处于空闲态并且驻留在不支持近距离业务的小区；
    其中驻留的小区所在的载波上的一个或多个小区支持近距离业务，或者与驻留的小区所在的载波具有相同优先级的载波上的部分小区或全部小区支持近距离业务。
  20. 根据权利要求18所述的通信系统，其中，所述通信系统还包括：
    基站，向所述用户设备发送系统信息，其中所述系统信息包括：支持近距离业务的小区信息和/或支持近距离业务的载波信息。
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