WO2017118211A1 - 一种小区选择方法、装置及系统 - Google Patents

一种小区选择方法、装置及系统 Download PDF

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Publication number
WO2017118211A1
WO2017118211A1 PCT/CN2016/105201 CN2016105201W WO2017118211A1 WO 2017118211 A1 WO2017118211 A1 WO 2017118211A1 CN 2016105201 W CN2016105201 W CN 2016105201W WO 2017118211 A1 WO2017118211 A1 WO 2017118211A1
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WO
WIPO (PCT)
Prior art keywords
reselection
factor
cell
terminal
network bearer
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PCT/CN2016/105201
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English (en)
French (fr)
Inventor
沙秀斌
戴谦
艾建勋
邹伟
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中兴通讯股份有限公司
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Publication of WO2017118211A1 publication Critical patent/WO2017118211A1/zh

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    • 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
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • This document relates to, but is not limited to, wireless communication technologies, and in particular, to a cell selection method, apparatus and system.
  • M2M (Machine to Machine) communication is an important subject of the fifth generation of mobile communication technology (5G), and an important application field for wireless communication in the future.
  • 5G mobile communication technology
  • NB-IoT Narrow Band-Internet of Things
  • Low-cost terminals UE, User Equipment
  • UE User Equipment
  • the carrier may have different carrier-differentiated bearer policies: for example, VIP (Very Important Person) users are carried on a lightly loaded carrier to ensure the quality of service (QoS, Quality of Service).
  • QoS Quality of Service
  • the UE with low radio coverage is carried on the carrier with low frequency as much as possible to improve the radio coverage quality.
  • the UEs with different narrowband capabilities are carried on different carriers as much as possible to avoid fragmentation of spectrum resources.
  • these requirements of the operator are implemented by handover of a connection mode or carrier reconfiguration when radio resource control (RRC) is established.
  • RRC radio resource control
  • the NB-IoT standard has basically reached an opinion: switching of the connection mode is not supported.
  • the NB-IoT standard generally adopts a strategy of reusing the Long Term Evolution (LTE) standard and the process as much as possible, and the RRC setup message of the LTE does not carry the cell identification information (physical cell identifier, frequency point), so the current In the NB-IoT device, the cell in which the UE connection mode is located can only be the cell in which the UE is in the idle mode when the service connection is initiated.
  • the NB-IoT device cannot implement the different carrier differentiated bearer policies at present.
  • the embodiments of the present invention provide a cell selection method, device, and system, which can implement the requirements of different carrier differentiated bearer policies.
  • the terminal receives, from the base station, a broadcast message carrying a reselection factor of the cell, where the reselection factor refers to a service bearer level determined according to a network bearer characteristic or an idle mode terminal residing level;
  • the terminal When performing cell selection and/or reselection, the terminal compares the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message, and determines the target cell according to the comparison result.
  • the terminal compares the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message, and determines the target cell according to the comparison result, where the method further includes: the terminal from the base station Receiving dedicated signaling, obtaining a reselection factor of the terminal from the dedicated signaling.
  • the terminal compares the reselection factor of the terminal and the reselection factor of the cell that is carried by the broadcast message, and determines the target cell according to the comparison result, where the method further includes: the terminal pre-configuring the terminal Reselection factor.
  • the terminal compares the reselection factor of the current terminal and the reselection factor of the cell carried by the broadcast message, and determines the target cell according to the comparison result, where the terminal includes the reselection factor of the terminal Comparing the reselection factors of the cells carried by the broadcast message, selecting a cell with the same reselection factor as the reselection factor of the terminal as the target cell, or selecting a cell with the network bearer characteristic that best matches the network bearer characteristic of the terminal as Target cell.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the embodiment of the invention further provides a cell selection method, including:
  • the base station sets a reselection factor of the cell, where the reselection factor refers to a service bearer level determined according to a network bearer characteristic or an idle mode terminal residing level;
  • the base station sends a broadcast message carrying a reselection factor of the cell to the terminal.
  • the base station sets a reselection factor of the cell, including: the base station according to the network bearer
  • the characteristics and the predetermined cell bearer policy are set according to the setting principle.
  • the setting principle includes: a reselection factor of a cell having the same network bearer characteristic is set to be the same, and a reselection factor of a cell having different network bearer characteristics is set to be different.
  • the method further includes: the base station determining a reselection factor of the terminal.
  • the determining, by the base station, the reselection factor of the terminal the determining, by the base station, the cell that the terminal tends to bear according to the network bearer characteristic, and determining, by the base station, a reselection factor of the cell that the terminal tends to bear as the The reselection factor of the terminal.
  • the method further includes: sending, by the base station, the reselection factor of the terminal to the terminal by using dedicated signaling.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the embodiment of the invention further provides a cell selection device, which is applied to the terminal, and includes:
  • the broadcast receiving module is configured to receive, from the base station, a broadcast message that carries a reselection factor of the cell, where the reselection factor refers to a service bearer level determined according to a network bearer characteristic or an idle mode terminal camp level;
  • the selecting module is configured to compare the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message when performing cell selection and/or reselection, and determine the target cell according to the comparison result.
  • the foregoing apparatus further includes: a terminal reselection factor maintenance module, configured to receive dedicated signaling from the base station, and obtain a reselection factor of the terminal from the dedicated signaling.
  • a terminal reselection factor maintenance module configured to receive dedicated signaling from the base station, and obtain a reselection factor of the terminal from the dedicated signaling.
  • the foregoing apparatus further includes: a terminal reselection factor preset module, configured to pre-configure a reselection factor of the terminal.
  • the selecting module is configured to: when performing cell selection and/or reselection, compare a reselection factor of the terminal with a reselection factor of a cell carried by the broadcast message, and select a reselection factor.
  • a cell having the same reselection factor as the target cell is used as the target cell, or a cell having the network bearer characteristic and the network bearer characteristic of the terminal is selected as the target cell.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the embodiment of the invention further provides a cell selection device, which is applied to a base station, and includes:
  • a setting module configured to set a reselection factor of the cell, where the reselection factor refers to a service bearer level determined according to a network bearer characteristic or an idle mode terminal residing level;
  • the broadcast module is configured to send a broadcast message carrying a reselection factor of the cell to the terminal.
  • the setting module is configured to: according to a network bearer characteristic and a predetermined cell bearer policy, set a cell reselection factor according to a setting principle.
  • the setting principle includes: a reselection factor of a cell having the same network bearer characteristic is set to be the same, and a reselection factor of a cell having different network bearer characteristics is set to be different.
  • the apparatus further includes: a terminal reselection factor decision module, configured to determine a reselection factor of the terminal.
  • a terminal reselection factor decision module configured to determine a reselection factor of the terminal.
  • the terminal reselection factor decision module is configured to: determine, according to network bearer characteristics, a cell that the terminal tends to bear, and determine a reselection factor of the cell that the terminal tends to bear as a reselection of the terminal. factor.
  • the foregoing apparatus further includes: a terminal reselection factor configuration module, configured to send the reselection factor of the terminal to the terminal by using dedicated signaling.
  • a terminal reselection factor configuration module configured to send the reselection factor of the terminal to the terminal by using dedicated signaling.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the embodiment of the present invention further provides a cell selection system, including: a terminal and a base station; the base station is configured to set a reselection factor of the cell, and send a broadcast message carrying a reselection factor of the cell to the terminal; And determining, when performing cell selection and/or reselection, comparing a reselection factor of the terminal and a reselection factor of the cell carried by the broadcast message, and determining a target cell according to the comparison result; wherein the reselecting The factor refers to the service bearer level determined according to the network bearer characteristics or the idle mode terminal camping level.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when the computer executable instructions are executed.
  • the embodiment of the invention further provides a computer readable storage medium, which stores a computer executable finger
  • the above cell selection method at the base station side is implemented when the computer executable instructions are executed.
  • the base station sets a reselection factor of the cell, and sends a broadcast message carrying the reselection factor of the cell to the terminal; when performing cell selection and/or reselection, the terminal reselects the reselection factor of the terminal and broadcasts
  • the reselection factors of the cells carried by the message are compared, and the target cell is determined according to the comparison result; where the reselection factor refers to the service bearer level determined according to the network bearer characteristics or the idle mode terminal residing level. In this way, the need for different carrier differentiated bearer strategies is realized.
  • FIG. 1 is a flowchart of a cell selection method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a cell selection method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of setting a reselection factor of different cell layers according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of a cell selection system according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a cell selection method according to an embodiment of the present invention. As shown in FIG. 1 , the method provided in this embodiment includes the following steps:
  • Step 101 The base station sets a reselection factor of the cell.
  • Step 102 The base station sends a broadcast message carrying the reselection factor of the cell to the terminal.
  • the reselection factor refers to a service bearer level or an idle mode terminal residing level determined according to a network bearer characteristic.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • step 101 includes: the base station sets the reselection factor of the cell according to the setting principle according to the network bearer characteristic and the predetermined cell bearer policy.
  • the setting principle includes: the reselection factors of the cells having the same network bearer characteristics are set to be the same, and the reselection factors of the cells having different network bearer characteristics are set to be different.
  • the predetermined cell bearer policy includes: a network bearer characteristic of each cell set by the operator, where the network bearer characteristic of each cell includes, for example, part or all of the predetermined network bearer characteristics. If the value of the reselection factor is represented by a numerical value, the values of the reselection factors of the cells having the same network bearer characteristics are the same, and the values of the reselection factors of the cells having different network bearer characteristics are different.
  • the specific numerical value of the embodiment of the present invention is not limited as long as the above setting principle is satisfied.
  • the reselection factors of the cells having the same network bearer characteristics are the same, and the reselection factors of the cells having different network bearer characteristics are different. .
  • This embodiment of the present invention is not limited thereto.
  • the method further includes: determining, by the base station, a reselection factor of the terminal.
  • the determining, by the base station, the reselection factor of the terminal the determining, by the base station, the cell that the terminal tends to bear according to the network bearer characteristic, and determining, by the terminal, a reselection factor of the cell that the terminal tends to bear as the terminal Reselection factor.
  • the method further includes: sending, by the base station, the reselection factor of the terminal to the terminal by using dedicated signaling.
  • FIG. 2 is a schematic diagram of a cell selection method according to an embodiment of the present invention. As shown in FIG. 2, the cell selection method provided in this embodiment includes the following steps:
  • Step 201 The terminal receives, from the base station, a broadcast message carrying a reselection factor of the cell.
  • Step 202 When performing cell selection and/or reselection, the terminal compares the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message, and determines the target cell according to the comparison result.
  • the terminal when performing cell selection, compares the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message, and determines the selected target cell according to the comparison result; or, when performing cell reselection, The terminal re-selects the reselection factor of the terminal and the weight of the cell carried by the broadcast message. Selecting factors for comparison, and determining a reselected target cell according to the comparison result; or, when performing cell selection and reselection, the terminal compares the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message, and according to The comparison result determines the target cell.
  • the reselection factor refers to a service bearer level or an idle mode terminal residing level determined according to a network bearer characteristic.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the method further includes: the terminal receiving the dedicated signaling from the base station, and acquiring the reselection factor of the terminal from the dedicated signaling.
  • the method further includes: the terminal pre-configuring a reselection factor of the terminal.
  • the operator configures a reselection factor for each terminal.
  • the operator can pre-configure the default reselection factor in the Universal Subscriber Identity Module (USIM) card.
  • the reselection factor can also be configured for the terminal through dedicated signaling. If the reselection factor is not configured for the terminal through dedicated signaling, the reselection factor of the default configuration shall prevail; if the reselection factor is configured for the terminal through dedicated signaling, the reconfiguration factor of the last configuration shall prevail;
  • the terminal does not have a reselection factor configured for the terminal through dedicated signaling, and there is no reselection factor configured by default. The terminal does not consider the reselection factor when the cell is reselected.
  • the step 202 includes: comparing, by the terminal, the reselection factor of the local terminal with a reselection factor of the cell carried by the broadcast message, selecting a cell with the same reselection factor as the reselection factor of the terminal as the target cell, or selecting The cell with the network bearer characteristic and the network bearer characteristic of the terminal is the target cell.
  • the reselection factors of the cells with the same network bearer characteristics are set to be the same, and the reselection factors of the terminal are determined according to the reselection factors of the cells that the terminal tends to bear, and therefore, if the reselection factors of the cells are the same as the weight of the terminal
  • the selection factor is the same, indicating that the network bearer characteristic of the cell satisfies the network bearer characteristics required by the terminal, and the cell is selected as the target cell. If there is no cell in the candidate cell that has the same reselection factor as the reselection factor of the terminal, the cell with the network bearer characteristic that best matches the network bearer characteristic of the terminal is selected as the target cell.
  • the cell bearer characteristics of the cell and the terminal The degree of allocation is determined according to the ratio of the number of identical network bearer characteristics of the cell and the terminal to the number of network bearer characteristics of the terminal. In other words, different combinations of network bearer characteristics corresponding to different reselection factors are different, and a cell having the same number of network bearer characteristics as the network bearer characteristics of the terminal is used as the target cell.
  • FIG. 3 is an example of reselection factor setting of different cell layers in this embodiment.
  • the cell bearer strategy consider the following factors:
  • VIP user common user (the specific identification policy is determined by the operator and implemented in the base station (eNodeB));
  • UE capability Single-Tone capability, Multi-Tone capability
  • Service attributes big data service, cell data service (the specific identification strategy is determined by the operator and implemented in the eNodeB);
  • the UE coverage level is high and the UE coverage level is low (the specific identification policy is determined by the operator and implemented in the eNodeB).
  • the specific cell bearer strategy is as follows:
  • the multi-frequency point cell layer A has a large capacity and a high radio frequency value, and is mainly used to carry the ordinary service initiated by the ordinary user's Single-Tone capability UE;
  • Multi-frequency point cell layer B large capacity, high radio frequency value, mainly used to carry ordinary services initiated by ordinary users Multi-Tone capable UE;
  • Multi-frequency point cell layer C large capacity, high radio frequency value, mainly used to carry ordinary services initiated by ordinary users Multi-Tone capable UE;
  • Multi-frequency point cell layer D large capacity and low radio frequency value, mainly used to carry services initiated by ordinary users with low UE coverage and big data services of all users;
  • Single-frequency point cell layer E small capacity, low radio frequency value, mainly used to carry VIP users Business.
  • the network bearer characteristics of the cell layer B and the cell layer C are the same, and the network bearer characteristics of the cell layer A, the cell layer B/C, the cell layer D, and the cell layer E are different.
  • the network layer characteristics of the cell layer B and the cell layer C are the same, and the reselection factors of the cells are set to be the same, for example, all are 2; cell layer A, cell layer B/C, cell layer D, cell layer E
  • the network bearer characteristics are different, and the reselection factors are set to be different. Therefore, the reselection factor for each cell layer is set, for example, as follows:
  • the cell selection method provided in this embodiment includes the following steps:
  • Step 401 The eNodeB sets the reselection factor of the cell according to the network bearer characteristics to be considered and the bearer policy requirement of the operator, where the reselection factors of the cells with the same network bearer characteristics are set to be the same; the cells with different network bearer characteristics are The reselection factor is set to be different.
  • the reselection factor of each cell layer is set as follows:
  • Step 402 The eNodeB broadcasts a reselection factor of the broadcast cell and the neighboring cell to the broadcast message by using the broadcast message. UE.
  • Step 403 The eNodeB sets a reselection factor of the UE.
  • the eNodeB considers the user priority of the UE, the UE capability, the UE coverage level, the cell load, and the like, and determines that the UE tends to be carried on one carrier, and the reselection factor of the UE is set to the cell corresponding to the carrier. Reselection factor.
  • Step 404 The eNodeB sends the reselection factor of the UE to the UE by using dedicated signaling, where the dedicated signaling for sending the reselection factor may be a paging message (Paging message), an RRC connection release message, an RRC connection reject message, and the like. Message.
  • the dedicated signaling for sending the reselection factor may be a paging message (Paging message), an RRC connection release message, an RRC connection reject message, and the like. Message.
  • Step 405 The UE performs cell reselection according to the reselection factor of the cell and the reselection factor of the cell.
  • the UE matches the reselection factor of the cell with the reselection factor of the cell, and preferentially selects the reselection factor and the UE.
  • the cell with the same reselection factor is used as the target cell for cell selection and reselection; if there is no cell with the same reselection factor as the reselection factor of the UE, the cell with the best network matching feature and the network bearer characteristic of the terminal is selected as the cell. Select and reselect the target cell.
  • FIG. 5 is a flowchart of Embodiment 2 of the present invention. As shown in FIG. 5, this embodiment provides an example of modifying a reselection factor of a UE by dedicated signaling.
  • the default reselection factor is 4.
  • Step 501 When the paging message is sent by pushing the software download to the VIP user, since the big data service such as software download is carried on the cell layer D, the reselection factor of the cell layer D is 3. Therefore, the reselection factor of the UE is set. Is 3;
  • Step 504 The UE establishes an RRC connection on the cell layer D and performs big data transmission of software downloading.
  • FIG. 6 is a flowchart of Embodiment 3 of the present invention. As shown in FIG. 6, this embodiment provides an example of a cell reselection rule based on a reselection factor and other cell reselection rules.
  • the cell layer refers to a set of candidate cells having the same reselection factor.
  • Step 601 The UE determines whether the current cell layer does not have a cell that satisfies the camping condition.
  • step 602 the UE determines whether there is a cell layer whose reselection factor is closer to the reselection factor of the UE;
  • cell reselection is performed in all candidate cell layers, and the reselection factor is preferentially selected in the cell layer closer to the reselection factor of the UE. Resident cell as a target cell for reselection;
  • cell reselection is performed in all candidate cell layers, and the campable cell in the cell layer that is closer to the UE reselection factor is preferentially selected as the weight. Selected target cell;
  • the radio quality ranking, frequency prioritization, etc. are performed in the currently camped cell layer. Regular cell reselection.
  • the embodiment of the present invention further provides a cell selection apparatus, which is applied to a terminal, and includes: a broadcast receiving module, configured to receive, from a base station, a broadcast message that carries a reselection factor of a cell, where the reselection factor refers to a network according to a network. a service bearer level determined by the bearer characteristic or an idle mode terminal residing level; the selecting module is configured to: when performing cell selection and/or reselection, the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message The comparison is made and the target cell is determined based on the comparison result.
  • a broadcast receiving module configured to receive, from a base station, a broadcast message that carries a reselection factor of a cell, where the reselection factor refers to a network according to a network.
  • a service bearer level determined by the bearer characteristic or an idle mode terminal residing level
  • the selecting module is configured to: when
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the foregoing apparatus further includes: a terminal reselection factor maintenance module, configured to receive dedicated signaling from the base station, and obtain a reselection factor of the terminal from the dedicated signaling.
  • a terminal reselection factor maintenance module configured to receive dedicated signaling from the base station, and obtain a reselection factor of the terminal from the dedicated signaling.
  • the foregoing apparatus further includes: a terminal reselection factor preset module, configured to pre-configure a reselection factor of the terminal.
  • the selecting module is configured to: when performing cell selection and/or reselection, compare a reselection factor of the terminal with a reselection factor of a cell carried by the broadcast message, and select a reselection factor.
  • a cell having the same reselection factor as the target cell is used as the target cell, or a cell having the network bearer characteristic and the network bearer characteristic of the terminal is selected as the target cell.
  • the embodiment of the present invention further provides a cell selection apparatus, which is applied to a base station, and includes: a setting module, configured to set a reselection factor of a cell, where the reselection factor refers to a service bearer level determined according to a network bearer characteristic. Or an idle mode terminal residing level; the broadcast module is configured to send a broadcast message carrying a reselection factor of the cell to the terminal.
  • a setting module configured to set a reselection factor of a cell, where the reselection factor refers to a service bearer level determined according to a network bearer characteristic. Or an idle mode terminal residing level
  • the broadcast module is configured to send a broadcast message carrying a reselection factor of the cell to the terminal.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • the setting module is configured to: according to a network bearer characteristic and a predetermined cell bearer policy, set a cell reselection factor according to a setting principle.
  • the setting principle includes: the reselection factors of the cells having the same network bearer characteristic are set to be the same, and the reselection factors of the cells having different network bearer characteristics are set to be different.
  • the apparatus further includes: a terminal reselection factor decision module, configured to determine a reselection factor of the terminal.
  • a terminal reselection factor decision module configured to determine a reselection factor of the terminal.
  • the terminal reselection factor decision module is configured to: determine, according to network bearer characteristics, a cell that the terminal tends to bear, and determine a reselection factor of the cell that the terminal tends to bear as a reselection factor of the terminal.
  • the foregoing apparatus further includes: a terminal reselection factor configuration module, configured to send the reselection factor of the terminal to the terminal by using dedicated signaling.
  • a terminal reselection factor configuration module configured to send the reselection factor of the terminal to the terminal by using dedicated signaling.
  • the embodiment of the present invention further provides a cell selection system, including: a terminal and a base station; the base station is configured to set a reselection factor of the cell, and send a broadcast message carrying a reselection factor of the cell to the terminal;
  • the terminal is configured to compare the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message when performing cell selection and/or reselection, and according to the comparison Determining a target cell; wherein the reselection factor refers to a service bearer level or an idle mode terminal camping level determined according to a network bearer characteristic.
  • the network bearer feature includes at least one of the following related factors: user priority, terminal capability, terminal coverage level, cell capacity, cell coverage, and service attributes.
  • FIG. 7 is a schematic diagram of a cell selection system according to an embodiment of the present invention.
  • the cell selection system provided in this embodiment includes: a UE and an eNodeB.
  • the eNodeB includes: a setting module, a broadcast module, a UE reselection factor decision module, and a UE reselection factor configuration module.
  • the UE includes: a broadcast receiving module, a UE reselection factor preset module, a UE reselection factor maintenance module, and a selection module.
  • the setting module is configured to set a reselection factor of the cell according to an operator requirement, where the setting principle is: a reselection factor setting of a cell layer having the same bearer characteristic is the same; a reselection factor of a cell layer having different bearer characteristics The settings are different.
  • the broadcast module is configured to transmit the reselection factor of the set cell to the UE by using a broadcast message.
  • the UE reselection factor decision module is configured to comprehensively consider factors such as user priority, UE capability, UE coverage level, and cell load, determine a carrier that the UE tends to bear, and set a reselection factor of the UE to a cell corresponding to the carrier. Reselection factor.
  • the UE reselection factor configuration module is configured to send the determined reselection factor of the UE to the UE by dedicated signaling.
  • the broadcast receiving module is configured to receive a broadcast message and obtain a reselection factor of the cell from the broadcast message.
  • the UE reselection factor maintenance module is configured to receive dedicated signaling, and obtain a reselection factor of the UE from the dedicated signaling.
  • the selection module is configured to match the UE's own reselection factor with the cell's reselection factor, and preferentially select the cell whose reselection factor is closest to the UE's reselection factor as the target cell for cell selection and reselection.
  • the UE reselection factor preset module is configured to preset a reselection factor of the UE in the USIM initial subscription information, or adopt an agreed reselection factor when the UE does not have a preset reselection factor.
  • the UE reselection factor maintenance module stores a reselection factor of the preset UE. If the reselection factor of the dedicated signaling configuration is not received, the preset reselection factor is taken as the standard; if the reselection factor of the dedicated signaling configuration is received, the last configured reselection factor is taken as the standard.
  • the setting module and the UE reselection factor decision module are, for example, a processor
  • the broadcast module and the UE reselection factor configuration module are, for example, a wireless communication unit having a transmitting function
  • the broadcast receiving module is, for example, a wireless communication unit having a receiving function.
  • the UE reselection factor preset module, the UE reselection factor maintenance module, and the selection module are, for example, processors.
  • this embodiment of the present invention Not limited.
  • the example of the present invention can comprehensively consider the user priority, the UE capability, the UE coverage level, and the cell load according to the requirements of the operator, and thus the requirements of different carrier differentiated bearer policies can be implemented.
  • an embodiment of the present invention further provides a terminal, including: a wireless communication unit and a processor, where the wireless communication unit is connected to the processor, and the wireless communication unit is configured to receive, from the base station, a broadcast message carrying a reselection factor of the cell, where the processor is configured to When performing cell selection and/or reselection, the reselection factor of the terminal and the reselection factor of the cell carried by the broadcast message are compared, and the target cell is determined according to the comparison result.
  • the reselection factor refers to a service bearer level or an idle mode terminal residing level determined according to a network bearer characteristic.
  • an embodiment of the present invention further provides a computer readable storage medium, where computer executable instructions are stored, and when the computer executable instructions are executed, the cell selection method on the terminal side is implemented.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when the computer executable instructions are executed.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • the invention is not limited to any specific form of combination of hardware and software.

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Abstract

一种小区选择方法、装置及系统。终端从基站接收携带小区的重选因子的广播消息；在进行小区选择和/或重选时，终端将本终端的重选因子以及广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区；其中，重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。上述技术方案公开的小区选择方法、装置及系统，能够实现不同载波差异化承载策略的需求。

Description

一种小区选择方法、装置及系统 技术领域
本文涉及但不限于无线通信技术，尤其涉及一种小区选择方法、装置及系统。
背景技术
机器间(M2M，Machine to Machine)通信是第五代移动通信技术(5G)目前研究的一个重要课题，也是未来无线通信的一个重要应用领域。在M2M通信课题里，针对低成本低吞吐量类型终端的特性，提出了窄带物联网(NB-IoT，Narrow Band-Internet of Things)的研究子课题：也就是在200khz的频带内为NB-IoT低成本终端(UE，User Equipment)提供低吞吐量的无线通信服务。
在商用网络中，运营商可能有不同载波差异化承载策略的需求：比如贵宾(VIP，Very Important Person)用户尽量承载于负荷轻的载波上，以保证用户的服务质量(QoS，Quality of Service)；低无线覆盖等级的UE尽量承载于低频率的载波上，以尽量提高无线覆盖质量；不同窄带能力的UE尽量承载于不同载波上，以避免频谱资源碎片等。在常规的网络中，运营商的这些需求是通过连接模式的切换或者无线资源控制(RRC，Radio Resource Control)建立时的载波重配置来实现的。但是，NB-IoT标准已基本达成意见：不支持连接模式的切换。此外，NB-IoT标准一般采用尽可能重用长期演进(LTE，Long Term Evolution)标准及流程等策略，而LTE的RRC建立消息中没有携带小区标识信息(物理小区标识、频点)，所以目前的NB-IoT设备中，UE连接模式所处的小区只能是UE在发起业务连接时所处空闲模式驻留的小区，NB-IoT设备目前无法实现不同载波差异化承载策略的需求。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例提供一种小区选择方法、装置及系统，能够实现不同载波差异化承载策略的需求。
本发明实施例一种小区选择方法，包括：
终端从基站接收携带小区的重选因子的广播消息，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
在进行小区选择和/或重选时，所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。
可选地，所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区之前，上述方法还包括：所述终端从所述基站接收专用信令，从所述专用信令中获取本终端的重选因子。
可选地，所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区之前，上述方法还包括：所述终端预配置本终端的重选因子。
可选地，所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区，包括：所述终端将本终端的重选因子与所述广播消息携带的小区的重选因子进行比较，选择重选因子与本终端的重选因子相同的小区作为目标小区，或者，选择网络承载特性与本终端的网络承载特性最匹配的小区作为目标小区。
可选地，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
本发明实施例还提供一种小区选择方法，包括：
基站设置小区的重选因子，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
所述基站发送携带小区的重选因子的广播消息给终端。
可选地，所述基站设置小区的重选因子，包括：所述基站根据网络承载 特性以及预定的小区承载策略，按照设置原则设置小区的重选因子。
可选地，所述设置原则包括：具有相同网络承载特性的小区的重选因子设置为相同，具有不同网络承载特性的小区的重选因子设置为不同。
可选地，上述方法还包括：所述基站确定所述终端的重选因子。
可选地，所述基站确定所述终端的重选因子，包括：所述基站根据网络承载特性确定所述终端倾向承载的小区，并确定所述终端倾向承载的小区的重选因子作为所述终端的重选因子。
可选地，所述基站确定所述终端的重选因子之后，上述方法还包括：所述基站通过专用信令将所述终端的重选因子发送给所述终端。
可选地，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
本发明实施例还提供一种小区选择装置，应用于终端，包括：
广播接收模块，设置为从基站接收携带小区的重选因子的广播消息，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
选择模块，设置为在进行小区选择和/或重选时，将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。
可选地，上述装置还包括：终端重选因子维护模块，设置为从所述基站接收专用信令，从所述专用信令中获取本终端的重选因子。
可选地，上述装置还包括：终端重选因子预置模块，设置为预配置本终端的重选因子。
可选地，所述选择模块，是设置为：在进行小区选择和/或重选时，将本终端的重选因子与所述广播消息携带的小区的重选因子进行比较，选择重选因子与本终端的重选因子相同的小区作为目标小区，或者，选择网络承载特性与本终端的网络承载特性最匹配的小区作为目标小区。
可选地，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
本发明实施例还提供一种小区选择装置，应用于基站，包括：
设置模块，设置为设置小区的重选因子，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
广播模块，设置为发送携带小区的重选因子的广播消息给终端。
可选地，所述设置模块，是设置为：根据网络承载特性以及预定的小区承载策略，按照设置原则设置小区的重选因子。
可选地，所述设置原则包括：具有相同网络承载特性的小区的重选因子设置为相同，具有不同网络承载特性的小区的重选因子设置为不同。
可选地，上述装置还包括：终端重选因子判决模块，设置为确定所述终端的重选因子。
可选地，所述终端重选因子判决模块，是设置为：根据网络承载特性确定所述终端倾向承载的小区，并确定所述终端倾向承载的小区的重选因子作为所述终端的重选因子。
可选地，上述装置还包括：终端重选因子配置模块，设置为通过专用信令将所述终端的重选因子发送给所述终端。
可选地，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
本发明实施例还提供一种小区选择系统，包括：终端及基站；所述基站，设置为设置小区的重选因子，并发送携带小区的重选因子的广播消息给所述终端；所述终端，设置为在进行小区选择和/或重选时，将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区；其中，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。
可选地，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现终端侧的上述小区选择方法。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指 令，所述计算机可执行指令被执行时实现基站侧的上述小区选择方法。
在本发明实施例中，基站设置小区的重选因子，并发送携带小区的重选因子的广播消息给终端；在进行小区选择和/或重选时，终端将本终端的重选因子以及广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区；其中，重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。如此，实现不同载波差异化承载策略的需要。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为本发明实施例提供的小区选择方法的流程图；
图2为本发明实施例提供的小区选择方法的流程图；
图3为本发明实施例提供的不同小区层的重选因子设置示意图；
图4为本发明实施例一的流程图；
图5为本发明实施例二的流程图；
图6为本发明实施例三的流程图；
图7为本发明实施例提供的小区选择系统的示意图。
本发明的实施方式
以下结合附图对本发明实施例进行详细说明，应当理解，以下所说明的实施例仅用于说明和解释本申请，并不用于限定本申请。
图1为本发明实施例提供的小区选择方法的流程图。如图1所示，本实施例提供的方法，包括以下步骤：
步骤101：基站设置小区的重选因子；
步骤102：基站发送携带小区的重选因子的广播消息给终端。
其中，重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。
可选地，网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
可选地，步骤101包括：基站根据网络承载特性以及预定的小区承载策略，按照设置原则设置小区的重选因子。
其中，设置原则包括：具有相同网络承载特性的小区的重选因子设置为相同，具有不同网络承载特性的小区的重选因子设置为不同。
可选的，预定的小区承载策略包括：运营商设置的每个小区的网络承载特性，其中，每个小区的网络承载特性例如包括预定的网络承载特性中的部分或全部。若重选因子的取值以数值表示，则具有相同网络承载特性的小区的重选因子所取的数值相同，具有不同网络承载特性的小区的重选因子所取的数值不同。其中，本发明实施例对具体的数值并不限定，只要满足上述设置原则即可。若重选因子的取值以符号(或其他非数字方式)表示，则具有相同网络承载特性的小区的重选因子对应的符号相同，具有不同网络承载特性的小区的重选因子对应的符号不同。本发明实施例对此并不限定。
可选地，上述方法还包括：基站确定所述终端的重选因子。
其中，所述基站确定所述终端的重选因子，包括：所述基站根据网络承载特性确定所述终端倾向承载的小区，并确定所述终端倾向承载的小区的重选因子作为所述终端的重选因子。
可选地，所述基站确定所述终端的重选因子之后，上述方法还包括：所述基站通过专用信令将所述终端的重选因子发送给所述终端。
图2为本发明实施例提供的小区选择方法的示意图。如图2所示，本实施例提供的小区选择方法，包括以下步骤：
步骤201：终端从基站接收携带小区的重选因子的广播消息；
步骤202：在进行小区选择和/或重选时，终端将本终端的重选因子以及广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。
可选的，在进行小区选择时，终端将本终端的重选因子以及广播消息携带的小区的重选因子进行比较，并根据比较结果确定选择的目标小区；或者，在进行小区重选时，终端将本终端的重选因子以及广播消息携带的小区的重 选因子进行比较，并根据比较结果确定重选的目标小区；或者，在进行小区选择和重选时，终端将本终端的重选因子以及广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。
其中，重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。
可选地，网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
可选地，步骤202之前，上述方法还包括：终端从基站接收专用信令，从所述专用信令中获取本终端的重选因子。
可选地，步骤202之前，上述方法还包括：终端预配置本终端的重选因子。
可选的，运营商针对每个终端配置重选因子。运营商可以在全球用户身份识别模块(USIM，Universal Subscriber Identity Module)卡里预配置默认的重选因子；也可以通过专用信令给终端配置重选因子。若没有通过专用信令给终端配置重选因子，则以默认配置的重选因子为准；若通过专用信令给终端配置了重选因子，则以最后一次配置的重选因子为准；若既没有通过专用信令给终端配置重选因子，也没有默认配置的重选因子，则该终端在小区重选时不考虑重选因子。
可选地，步骤202包括：终端将本终端的重选因子与广播消息携带的小区的重选因子进行比较，选择重选因子与本终端的重选因子相同的小区作为目标小区，或者，选择网络承载特性与本终端的网络承载特性最匹配的小区作为目标小区。
可选的，具有相同网络承载特性的小区的重选因子设置为相同，且终端的重选因子根据终端所倾向承载的小区的重选因子确定，因此，若小区的重选因子与终端的重选因子相同，说明该小区的网络承载特性满足该终端所需的网络承载特性，则选择该小区为目标小区。若候选的小区中没有重选因子与本终端的重选因子相同的小区，则选择网络承载特性与本终端的网络承载特性最匹配的小区作为目标小区。其中，小区与本终端的网络承载特性的匹 配程度根据该小区和本终端的相同网络承载特性的数目与本终端的网络承载特性的数目之比确定。换言之，不同的重选因子对应的网络承载特性的组合不同，将具有与本终端的网络承载特性相同的网络承载特性的数目最多的小区作为目标小区。
图3为本实施例中不同小区层的重选因子设置的示例。
举例而言，假设运营商有五层小区(Cell)，希望小区承载策略考虑如下因素相关的特性：
小区容量大小：多频点小区容量大、单频点小区容量小；
小区覆盖范围：无线频率值越低，覆盖范围越大；无线频率值越高，覆盖范围越小；
用户优先级：VIP用户、普通用户(具体的识别策略由运营商确定，并在基站(eNodeB)内实现)；
UE能力：单频(Single-Tone)能力、多频(Multi-Tone)能力；
业务属性：大数据业务、小区数据业务(具体的识别策略由运营商确定，并在eNodeB内实现)；
UE覆盖等级：UE覆盖等级高、UE覆盖等级低(具体的识别策略由运营商确定，并在eNodeB内实现)。
具体的小区承载策略如下：
多频点小区层A：容量大，无线频率值高，主要用来承载普通用户Single-Tone能力UE发起的普通业务；
多频点小区层B：容量大，无线频率值高，主要用来承载普通用户Multi-Tone能力UE发起的普通业务；
多频点小区层C：容量大，无线频率值高，主要用来承载普通用户Multi-Tone能力UE发起的普通业务；
多频点小区层D：容量大，无线频率值低，主要用来承载UE覆盖等级低的普通用户发起的业务及所有用户的大数据业务；
单频点小区层E：容量小，无线频率值低，主要用来承载VIP用户的普 通业务。
基于上述小区承载策略可知，小区层B和小区层C的网络承载特性相同，小区层A、小区层B/C、小区层D、小区层E的网络承载特性各不相同。如图3所示，小区层B和小区层C的网络承载特性相同，小区的重选因子设置为相同，例如都为2；小区层A、小区层B/C、小区层D、小区层E的网络承载特性各不相同，重选因子设置为各不相同。因此，每个小区层的重选因子例如设置如下：
小区层A的小区：重选因子＝1；
小区层B的小区：重选因子＝2；
小区层C的小区：重选因子＝2；
小区层D的小区：重选因子＝3；
小区层E的小区：重选因子＝4。
图4为本发明实施例一的流程图。如图4所示，本实施例提供的小区选择方法，包括以下步骤：
步骤401：eNodeB根据需要考虑的网络承载特性及运营商的承载策略需求设置小区的重选因子，其中，具有相同网络承载特性的小区的重选因子设置为相同；具有不同网络承载特性的小区的重选因子设置为不同。
基于图3所示的运营商的网络环境及希望的载波承载策略假设，共有五层小区，其中，小区层B和小区层C的网络承载特性相同，小区层A、小区层B/C、小区层D、小区层E的网络承载特性各不相同，因此，每个小区层的重选因子设置如下：
小区层A的小区：重选因子＝1；
小区层B的小区：重选因子＝2；
小区层C的小区：重选因子＝2；
小区层D的小区：重选因子＝3；
小区层E的小区：重选因子＝4。
步骤402：eNodeB通过广播消息将广播小区及邻区的重选因子广播给 UE。
步骤403：eNodeB设置UE的重选因子；
可选的，eNodeB综合考虑UE的用户优先级、UE能力、UE覆盖等级、小区负荷等因素，确定UE倾向于承载在一个载波上，则该UE的重选因子设置为该载波对应的小区的重选因子。
步骤404：eNodeB通过专用信令将UE的重选因子发送给UE，其中，发送重选因子的专用信令可以是寻呼消息(Paging消息)，RRC连接释放消息、RRC连接拒绝消息等下行专用消息。
步骤405：UE根据自己的重选因子与小区的重选因子匹配来进行小区重选；可选的，UE将自己的重选因子与小区的重选因子相匹配，优先选择重选因子与UE的重选因子相同的小区作为小区选择与重选的目标小区；若没有重选因子与UE的重选因子相同的小区，则选择网络承载特性与本终端的网络承载特性最匹配的小区作为小区选择与重选的目标小区。
图5为本发明实施例二的流程图。如图5所示，本实施例提供了通过专用信令修改UE的重选因子的示例。
基于图3的示例，由于VIP用户的普通业务承载于小区层E上，所以默认的重选因子为4。
步骤501：当对VIP用户推送软件下载而发送寻呼消息时，由于软件下载等大数据业务承载于小区层D上，小区层D的重选因子为3，因此，将UE的重选因子设置为3；
步骤502：eNodeB在寻呼消息中携带“重选因子＝3”的信息；
步骤503：UE收到携带“重选因子＝3”的寻呼消息后，发现和自己当前的寻呼因子取值不同，触发小区重选，重选到小区层D上；
步骤504：UE在小区层D上建立RRC连接并进行软件下载的大数据传输；
步骤505：UE数据传输完成后，eNodeB通过RRC连接释放消息携带“重选因子＝4”的信息，以便该VIP用户在空闲模式驻留于承载VIP普通业务的小区层E上；
步骤506：UE收到携带“重选因子＝4”的RRC连接释放消息后，按照新的重选因子进行小区重选，驻留到小区层E上。
图6为本发明实施例三的流程图。如图6所示，本实施例提供了基于重选因子的小区重选规则与其他小区重选规则的示例。于此，小区层指重选因子相同的候选小区集合。
步骤601：UE判断当前小区层是否不存在满足驻留条件的小区；
如果当前小区层存在满足驻留条件的小区，步骤602：UE判断是否存在重选因子与UE的重选因子更接近的小区层；
若存在重选因子与UE的重选因子更接近的小区层，则在所有的候选小区层内进行小区重选，并优先选择重选因子与UE的重选因子更接近的小区层里的可驻留小区作为重选的目标小区；
若当前小区层不存在满足驻留条件的小区，则在所有的候选小区层内进行小区重选，并优先选择重选因子与UE重选因子更接近的小区层里的可驻留小区作为重选的目标小区；
若当前小区层存在满足驻留条件的小区，且不存在重选因子与UE重选因子更接近的小区层，则在当前驻留的小区层内进行基于无线质量排序、频点优先级排序等规则的小区重选。
此外，本发明实施例还提供一种小区选择装置，应用于终端，包括：广播接收模块，设置为从基站接收携带小区的重选因子的广播消息，其中，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；选择模块，设置为在进行小区选择和/或重选时，将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。
可选地，网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
可选地，上述装置还包括：终端重选因子维护模块，设置为从所述基站接收专用信令，从所述专用信令中获取本终端的重选因子。
可选地，上述装置还包括：终端重选因子预置模块，设置为预配置本终端的重选因子。
可选地，所述选择模块，是设置为：在进行小区选择和/或重选时，将本终端的重选因子与所述广播消息携带的小区的重选因子进行比较，选择重选因子与本终端的重选因子相同的小区作为目标小区，或者，选择网络承载特性与本终端的网络承载特性最匹配的小区作为目标小区。
此外，本发明实施例还提供一种小区选择装置，应用于基站，包括：设置模块，设置为设置小区的重选因子，其中，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；广播模块，设置为发送携带小区的重选因子的广播消息给终端。
可选地，网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
可选地，所述设置模块，是设置为：根据网络承载特性以及预定的小区承载策略，按照设置原则设置小区的重选因子。
其中，所述设置原则包括：具有相同网络承载特性的小区的重选因子设置为相同，具有不同网络承载特性的小区的重选因子设置为不同。
可选地，上述装置还包括：终端重选因子判决模块，设置为确定所述终端的重选因子。
其中，所述终端重选因子判决模块，是设置为：根据网络承载特性确定所述终端倾向承载的小区，并确定所述终端倾向承载的小区的重选因子作为所述终端的重选因子。
可选地，上述装置还包括：终端重选因子配置模块，设置为通过专用信令将所述终端的重选因子发送给所述终端。
关于上述装置的具体处理流程同上述方法所述，故于此不再赘述。
此外，本发明实施例还提供一种小区选择系统，包括：终端及基站；所述基站，设置为设置小区的重选因子，并发送携带小区的重选因子的广播消息给所述终端；所述终端，设置为在进行小区选择和/或重选时，将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结 果确定目标小区；其中，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。
可选地，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、业务属性。
图7为本发明一实施例提供的小区选择系统的示意图。本实施例提供的小区选择系统，包括：UE以及eNodeB。其中，eNodeB包括：设置模块、广播模块、UE重选因子判决模块以及UE重选因子配置模块；UE包括：广播接收模块、UE重选因子预置模块、UE重选因子维护模块以及选择模块。
可选的，设置模块设置为根据运营商需求设置小区的重选因子，其中，设置原则为：具有相同承载特性的小区层的重选因子设置相同；具有不同承载特性的小区层的重选因子设置不同。广播模块设置为将设置的小区的重选因子通过广播消息发送给UE。UE重选因子判决模块设置为综合考虑用户优先级、UE能力、UE覆盖等级、小区负荷等因素，确定UE倾向于承载的载波，并将该UE的重选因子设置为该载波对应的小区的重选因子。UE重选因子配置模块设置为通过专用信令将确定的UE的重选因子发送给UE。广播接收模块设置为接收广播消息，从广播消息中获取小区的重选因子。UE重选因子维护模块设置为接收专用信令，从专用信令中获取UE的重选因子。选择模块设置为将UE自己的重选因子与小区的重选因子相匹配，优先选择重选因子与UE的重选因子最接近的小区作为小区选择与重选的目标小区。
可选地，UE重选因子预置模块是设置为在USIM初始签约信息里，预置UE的重选因子，或者，当UE没有预置的重选因子时采用约定的重选因子。UE重选因子维护模块存储预置的UE的重选因子。如果没有收到专用信令配置的重选因子，则以预置的重选因子为准；如果收到了专用信令配置的重选因子，则以最后一次配置的重选因子为准。
此外，关于所述系统的具体处理流程同上述方法所述，故于此不再赘述。
于实际应用中，设置模块及UE重选因子判决模块例如为处理器，广播模块以及UE重选因子配置模块例如为具有发送功能的无线通信单元，广播接收模块例如为具有接收功能的无线通信单元，UE重选因子预置模块、UE重选因子维护模块以及选择模块例如为处理器。然而，本发明实施例对此并 不限定。
综上所述，本发明实例通过小区选择与重选时根据运营商的需求综合考虑用户优先级、UE能力、UE覆盖等级、小区负荷等因素，从而可以实现不同载波差异化承载策略的需求。
此外，本发明实施例还提供一种终端，包括：无线通信单元以及处理器，无线通信单元连接处理器，无线通信单元设置为从基站接收携带小区的重选因子的广播消息，处理器设置为在进行小区选择和/或重选时，将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。其中，重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现终端侧的上述小区选择方法。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现基站侧的上述小区选择方法。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本发明不限制于任何特定形式的硬件和软件的结合。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。
工业实用性
上述技术方案可实现不同载波差异化承载策略的需要。

Claims (26)

  1. 一种小区选择方法，包括：
    终端从基站接收携带小区的重选因子的广播消息，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
    在进行小区选择和/或重选时，所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。
  2. 根据权利要求1所述的方法，还包括：
    所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区之前，所述终端从所述基站接收专用信令，从所述专用信令中获取本终端的重选因子。
  3. 根据权利要求1所述的方法，还包括：
    所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区之前，所述终端预配置本终端的重选因子。
  4. 根据权利要求1所述的方法，其中，所述终端将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区，包括：
    所述终端将本终端的重选因子与所述广播消息携带的小区的重选因子进行比较，选择重选因子与本终端的重选因子相同的小区作为目标小区，或者，选择网络承载特性与本终端的网络承载特性最匹配的小区作为目标小区。
  5. 根据权利要求1至4任一项所述的方法，其中，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
  6. 一种小区选择方法，包括：
    基站设置小区的重选因子，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
    所述基站发送携带小区的重选因子的广播消息给终端。
  7. 根据权利要求6所述的方法，其中，所述基站设置小区的重选因子，包括：
    所述基站根据网络承载特性以及预定的小区承载策略，按照设置原则设置小区的重选因子。
  8. 根据权利要求7所述的方法，其中，所述设置原则包括：
    具有相同网络承载特性的小区的重选因子设置为相同，具有不同网络承载特性的小区的重选因子设置为不同。
  9. 根据权利要求6所述的方法，还包括：
    所述基站确定所述终端的重选因子。
  10. 根据权利要求9所述的方法，其中，所述基站确定所述终端的重选因子，包括：
    所述基站根据网络承载特性确定所述终端倾向承载的小区，并确定所述终端倾向承载的小区的重选因子作为所述终端的重选因子。
  11. 根据权利要求9或10所述的方法，还包括：
    所述基站确定所述终端的重选因子之后，所述基站通过专用信令将所述终端的重选因子发送给所述终端。
  12. 根据权利要求6至10任一项所述的方法，其中，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
  13. 一种小区选择装置，应用于终端，包括：
    广播接收模块，设置为从基站接收携带小区的重选因子的广播消息，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
    选择模块，设置为在进行小区选择和/或重选时，将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区。
  14. 根据权利要求13所述的装置，还包括：
    终端重选因子维护模块，设置为从所述基站接收专用信令，从所述专用信令中获取本终端的重选因子。
  15. 根据权利要求13所述的装置，还包括：
    终端重选因子预置模块，设置为预配置本终端的重选因子。
  16. 根据权利要求13所述的装置，其中，
    所述选择模块，是设置为在进行小区选择和/或重选时，将本终端的重选因子与所述广播消息携带的小区的重选因子进行比较，选择重选因子与本终端的重选因子相同的小区作为目标小区，或者，选择网络承载特性与本终端的网络承载特性最匹配的小区作为目标小区。
  17. 根据权利要求13至16任一项所述的装置，其中，所述网络承载特性包括以下至少一项因素相关的特性：用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
  18. 一种小区选择装置，应用于基站，包括：
    设置模块，设置为设置小区的重选因子，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级；
    广播模块，设置为发送携带小区的重选因子的广播消息给终端。
  19. 根据权利要求18所述的装置，其中，
    所述设置模块，是设置为根据网络承载特性以及预定的小区承载策略，按照设置原则设置小区的重选因子。
  20. 根据权利要求19所述的装置，其中，所述设置原则包括：
    具有相同网络承载特性的小区的重选因子设置为相同，具有不同网络承载特性的小区的重选因子设置为不同。
  21. 根据权利要求18所述的装置，还包括：
    终端重选因子判决模块，设置为确定所述终端的重选因子。
  22. 根据权利要求21所述的装置，其中，
    所述终端重选因子判决模块，是设置为根据网络承载特性确定所述终端 倾向承载的小区，并确定所述终端倾向承载的小区的重选因子作为所述终端的重选因子。
  23. 根据权利要求21或22所述的装置，还包括：
    终端重选因子配置模块，设置为通过专用信令将所述终端的重选因子发送给所述终端。
  24. 根据权利要求18至22任一项所述的装置，其中，所述网络承载特性包括以下至少一项因素相关的特性：
    用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
  25. 一种小区选择系统，包括：终端及基站；
    所述基站，设置为设置小区的重选因子，并发送携带小区的重选因子的广播消息给所述终端；
    所述终端，设置为在进行小区选择和/或重选时，将本终端的重选因子以及所述广播消息携带的小区的重选因子进行比较，并根据比较结果确定目标小区；其中，所述重选因子是指根据网络承载特性确定的业务承载等级或者空闲模式终端驻留等级。
  26. 根据权利要求25所述的系统，其中，所述网络承载特性包括以下至少一项因素相关的特性：
    用户优先级、终端能力、终端覆盖等级、小区容量、小区覆盖范围、和业务属性。
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