WO2013063885A1 - 一种lte-a系统中载波聚合的方法和装置 - Google Patents

一种lte-a系统中载波聚合的方法和装置 Download PDF

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Publication number
WO2013063885A1
WO2013063885A1 PCT/CN2012/071387 CN2012071387W WO2013063885A1 WO 2013063885 A1 WO2013063885 A1 WO 2013063885A1 CN 2012071387 W CN2012071387 W CN 2012071387W WO 2013063885 A1 WO2013063885 A1 WO 2013063885A1
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Prior art keywords
secondary cell
cell
network side
current
list
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PCT/CN2012/071387
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English (en)
French (fr)
Inventor
陈继勋
闫鹏周
易鸿锋
石葵
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中兴通讯股份有限公司
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Priority to EP12846529.1A priority Critical patent/EP2775758B1/en
Publication of WO2013063885A1 publication Critical patent/WO2013063885A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method and apparatus for carrier aggregation in an LTE-A system.
  • LTE-A Long-Term Evolution-Advanced
  • 3GPP3 M Generic Generation Partnership Project
  • IMT-Advanced International Mobile Telecommunications Advanced
  • LTE-based technology evolution in order to meet the larger peak rate requirements of IMT-A and future communication, LTE-A supports a maximum bandwidth of 100MHz, but it is difficult to find such a large bandwidth in the available spectrum resources available. And the large bandwidth brings great difficulties to the hardware design of the base station and the terminal.
  • a technology is needed to make full use of them. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a method and apparatus for carrier aggregation in an LTE-A system to provide a spectrum resource with a large bandwidth.
  • the present invention uses the following technical solutions:
  • LTE-A Advanced Long Term Evolution
  • the network side constructs a secondary cell candidate cell list for the UE, and selects a secondary cell for the UE from the secondary cell candidate cell list.
  • the network side performs the following operations on the current secondary cell of the UE according to the quality of service decision of the secondary cell:
  • the corresponding secondary cell is added to the current secondary cell of the UE.
  • the step of the network side constructing the secondary cell candidate cell list for the UE includes: configuring one or more of the following neighboring cell lists of the primary cell to configure the secondary cell candidate cell list for the UE: The frequency neighbor relationship list, the inter-frequency neighbor relationship list, the same coverage neighbor relationship list, and the related relationship neighbor list.
  • the step of deleting, by the network side, the corresponding secondary cell from the current secondary cell of the UE according to the service quality decision of the secondary cell includes:
  • the network side deletes the secondary cell from the current secondary cell of the UE.
  • the step of the network side adding the corresponding secondary cell to the current secondary cell of the UE according to the quality of service decision of the UE includes:
  • the network side adds the corresponding secondary cell to the current secondary cell of the UE. in.
  • LTE-A Advanced Long Term Evolution
  • the network side constructs a secondary cell candidate cell list for the UE, and selects a secondary cell for the UE from the secondary cell candidate cell list;
  • the network side determines whether to activate the secondary cell in the current secondary cell of the UE according to the buffer size of the UE and the channel quality of a secondary cell.
  • the step of the network side constructing the secondary cell candidate cell list for the UE includes: configuring one or more of the following neighboring cell lists of the primary cell to configure the secondary cell candidate cell list for the UE: The frequency neighbor relationship list, the inter-frequency neighbor relationship list, the same coverage neighbor relationship list, and the related relationship neighbor list.
  • the step of the network side to activate the secondary cell in the current secondary cell of the UE according to the buffer size of the UE, the channel quality of a secondary cell, and the load decision includes: When the buffer status report (BSR) of the UE reaches the first threshold of the BSR, the channel quality indicator (CQI) on the secondary cell reaches the first threshold of CQI, and the load of the secondary cell to be activated is less than the load threshold, then The network side activates the secondary cell.
  • BSR buffer status report
  • CQI channel quality indicator
  • the step of the network side deactivating the secondary cell in the current secondary cell of the UE according to the buffer size of the UE and the channel quality decision of the secondary cell includes:
  • the network side explicitly deactivates the secondary cell.
  • An apparatus for implementing carrier aggregation in an Advanced Long Term Evolution (LTE-A) system includes a construction module, a secondary cell selection module, and a management module, where:
  • the constructing module is configured to: after the user equipment (UE) having the carrier aggregation capability is initially accessed into a primary cell, construct a secondary cell candidate cell list for the UE;
  • UE user equipment
  • the secondary cell selection module is configured to: select a secondary cell for the UE from the secondary cell candidate cell list constructed by the building module for the UE;
  • the management module is configured to: perform one or more of the following operations on a secondary cell in the current secondary cell of the UE:
  • the management module is configured to: determine to delete a secondary cell by: when the quality of service of a secondary cell in the current secondary cell of the UE is lower than a quality of service threshold, the network side is from the current secondary cell of the UE Delete the secondary cell;
  • the management module is configured to: determine to add a secondary cell in the following manner: when a secondary cell candidate When the serving quality of the secondary cell in the cell is higher than the QoS threshold and the current number of secondary cells of the UE does not reach the upper limit, the network side adds the secondary cell to the current secondary cell of the UE;
  • the management module is configured to: determine to activate a secondary cell by: when a buffer status report (BSR) of the UE reaches a first threshold of a BSR, and a channel quality indicator (CQI) on a secondary cell reaches a CQI first When the value of the secondary cell to be activated is less than the load threshold, the network side activates the secondary cell in the current secondary cell of the UE; or
  • the management module is configured to: deactivate a secondary cell by: when the BSR of the UE is lower than the second threshold of the BSR and the CQI of the secondary cell is lower than the second threshold of the CQI, the network side The secondary cell in the current secondary cell of the UE is explicitly deactivated.
  • carrier aggregation can be reasonably selected and used in the LTE-A system, the system can obtain larger bandwidth, and the system throughput is obviously improved.
  • 1 is a schematic diagram of in-band continuous carrier aggregation
  • FIG. 2 is a schematic diagram of in-band discontinuous carrier aggregation
  • FIG. 3 is a schematic diagram of inter-band discontinuous carrier aggregation
  • FIG. 4 is a flow chart showing an overview of a method according to an embodiment of the present invention.
  • FIG. 5 is a flow chart of Embodiment 1 of the present invention.
  • Figure 6 is a flow chart of Embodiment 2 of the present invention.
  • FIG. 7 is a flow chart of Embodiment 3 of the present invention.
  • Figure 8 is a flow chart of Embodiment 4 of the present invention.
  • Figure 9 is a flow chart of Embodiment 5 of the present invention.
  • Figure 10 is a block diagram showing the structure of a device according to a sixth embodiment of the present invention. Preferred embodiment of the invention
  • CA Carrier Aggregation
  • the CA refers to a base station that aggregates multiple component carriers (CCs) to provide services for the UE.
  • CCs component carriers
  • the number of aggregated CCs is up to five, each of which is at most 20 MHz, and the frequency can be continuously or dispersed.
  • the scenario of carrier aggregation can be divided into three types: Intra-Band (Contiguous) (as shown in Figure 1), Intra-Band (Non-Band, Non-contiguous) ( Figure 2) Show), Out-Band, Non-Contiguous, also known as inter-band discontinuous carrier aggregation (as shown in Figure 3).
  • the carrier that maintains the RRC connection with the UE is called a primary component carrier (PCC), which is referred to as a primary carrier, or a primary serving cell (PCell).
  • PCC primary component carrier
  • PCell primary serving cell
  • the carrier other than the primary carrier is called a secondary component.
  • the secondary composition carrier (SCC) is referred to as a secondary carrier (SCell, Secondary serving cell).
  • the PCC is always active and the SCC can be activated via PCC or activated SCC.
  • the SCC can be deactivated via the PCC or the activated SCC (including itself), and the SCC can also be deactivated by the discontinuous reception (DRXD, iscontinuous reception) and the deactivation timer.
  • DRXD discontinuous reception
  • CA technology can be applied to more efficiently utilize the spectrum resources available to the operator. It should be noted that, since carrier aggregation can only occur in areas that can be covered by multiple frequency bands, this document is mainly for scenarios where operators have multiple spectrum resources available.
  • Step 100 After the user equipment (UE, User Equipment) with carrier aggregation capability is initially connected to a cell (PCell), the network side ( For example, the eNB) constructs an SCell candidate cell list for the UE according to one or more of the following neighbor relationship lists of the PCell (ie, the cell accessed by the UE): a same-frequency neighbor relationship list, an inter-frequency neighbor relationship list, and the same coverage. a list of neighboring relationships, including a list of neighbors;
  • the network side For example, the eNB constructs an SCell candidate cell list for the UE according to one or more of the following neighbor relationship lists of the PCell (ie, the cell accessed by the UE): a same-frequency neighbor relationship list, an inter-frequency neighbor relationship list, and the same coverage.
  • a list of neighboring relationships including a list of neighbors;
  • the union of the foregoing plurality of neighbor relationship lists may be used as the SCell candidate cell of the UE. List.
  • Step 200 The eNB selects a cell from the SCell candidate cell list according to the UE capability, the UE supports the frequency of the candidate cell, and selects the selected cell as the SCell of the UE.
  • the frequency of the frequency and the quality of service information of the candidate cell to select the cell can be implemented by using the existing technology, and will not be repeated herein.
  • Step 300-1 Take one or more of the following operations based on the candidate SCell's quality of service decision:
  • Step 300-2 Determine whether the secondary cell is activated according to the buffer size of the UE, the channel quality of the SCell, and the load.
  • Step 300-3 Decide whether to activate the secondary cell according to the buffer size of the UE and the channel quality of the SCell.
  • steps 300-1, 300-2, 300-3 may be performed in the same embodiment, or may be performed in three embodiments, that is, any embodiment may include steps 100, 200, and 300-1, or include steps. 100, 200, and 300-2, or include steps 100, 200, and 300-3.
  • any combination of steps 300-1, 300-2, 300-3 may be included, including, for example, steps 300-1 and 300-2, or Steps 300-1 and 300-3, or steps 300-2 and 300-3.
  • the quality of service of a certain SCell of the UE is worse, it is lower than a preset quality of service threshold (for example,
  • the network side may delete the SCell
  • the network side adds the SCell candidate cell to the SCell of the UE. ;
  • BSR Buffer Status Report
  • CQI Channel Quality Indicator
  • a threshold (CQI m - th ) and the SCell to be activated is less than the preset load threshold (LOAD th ), then the SCell is activated (or enabled);
  • the SCell is activated (or enabled);
  • BSR LO — th a preset BSR second threshold
  • CQI — th the explicit Deactivate the SCell.
  • the first threshold of the BSR is greater than the second threshold of the BSR; the first threshold of the CQI is greater than the second threshold of the CQI.
  • the number of activated or deactivated SCells is determined according to the following table, where the BSR is the buffer status report of the current UE, and Ni and N 2 are respectively the corresponding number of SCells that need to be activated and need to be deactivated.
  • This embodiment describes how to select a SCell for a UE. As shown in FIG. 5, the method includes:
  • Step 101 The UE initially accesses a cell (PCell);
  • Step 102 The network side (for example, the eNB) constructs a list of SCell candidate cells of the UE according to one or more of the following neighbor relationship lists of the PCell (ie, the cell accessed by the UE):
  • Step 103 The eNB selects a cell from the SCell candidate cell list according to the UE capability, the frequency point supported by the UE, and the current SCell quality of service information, and uses the selected cell as the SCell of the UE.
  • the previous embodiment describes how to construct the SCell candidate cell list in the initial access and how to select the SCell from the candidate cell list.
  • the process can be performed periodically, as shown in FIG. :
  • Step 201 Select a candidate SCell from the SCell candidate cell list.
  • the selection may be made in a certain order, such as a priority order.
  • Step 202 Determine whether the quality of service of the candidate SCell exceeds a set service quality threshold (QSscell), and if yes, perform step 203; otherwise, end;
  • QSscell set service quality threshold
  • Step 203 Determine whether the current SCell number of the UE reaches an upper limit value (MAX scell ). If not, perform step 204; if yes, end;
  • Step 204 after the cell is added as the SCell of the UE, step 205 is performed;
  • Step 205 Determine whether all SCell candidate cells have been traversed, and if yes, end; if not, return to step 201 to reselect a candidate SCell to perform the above process.
  • the SCell in the candidate SCell After the SCell in the candidate SCell is added as the SCell, the SCell needs to be activated before being used.
  • the cell added as the SCell can be called the SCel to be activated when it is activated.
  • This embodiment describes how to activate the SCell. As shown in 7, including:
  • Step 301 Determine whether the current BSR of the UE reaches a preset BSR first threshold (BSRmjh). If yes, go to step 302; otherwise, end;
  • the BSR of the UE represents the buffer size of the UE, if the buffer is large enough, it means that the secondary carrier needs to be enabled to transmit data, and then the SCell is activated.
  • Step 302 Determine, according to Table 1, the number of SCells that need to be activated; Step 303, it is determined whether the CQI on the SCell to be activated reaches a preset CQI first threshold (CQImjh), and if so, step 304 is performed; otherwise, step 305 is performed;
  • CQImjh a preset CQI first threshold
  • Step 304 Sort according to the size of the CQI of each SCell to be activated (for example, from large to small); Step 305, determine whether all the SCells to be activated are determined, and if yes, perform step 306; otherwise, select the next SCell, return to the step 303;
  • Step 306 selecting SCells in order from SCQs sorted by CQI;
  • Step 307 it is determined whether the load of the selected SCell is less than the load threshold (LOAD th ), and if so, step 308 is performed; otherwise, return to step 306;
  • Step 308 determining whether the number of activated SCells reaches 3 ⁇ 4, if not, executing step 309; if yes, ending;
  • Step 309 activate (enable) the SCell
  • Step 310 Determine whether there is still a SCell to be activated, if yes, return to step 306; otherwise, end.
  • This embodiment describes how to deactivate the SCell, as shown in Figure 8, including:
  • Step 401 Determine whether the current BSR of the UE is lower than a preset BSR second threshold (BSR LO _th ). If yes, go to step 402; otherwise, end;
  • Step 402 according to Table 1 to determine the need to activate the total number SCell N 2, then the UE according to the number of currently activated SCell K, needed to determine the final number of M SCell deactivation;
  • M min ( N 2 , K ).
  • Step 403 it is determined to be deactivated on the SCell CQI is below a second predetermined width CQI value (CQI LO - th), if yes, perform step 404; otherwise, step 405 is performed;
  • Step 404 Perform, according to the size of the CQI of each SCell to be activated (for example, from small to large);
  • Step 405 it is determined whether all the SCells have been determined to be deactivated, and if so, step 406 is performed; otherwise, the next SCell is selected, and the process returns to step 403; Step 406: Select SCells in order from SCQs sorted by SCQ, and explicitly deactivate the SCells;
  • the number of SCells sorted by CQI is greater than M, the first M SCells are selected for explicit deactivation, and if less than M, the SCells are explicitly deactivated.
  • Step 407 Determine whether the number of deactivated SCells has not reached M. If yes, execute step 408; otherwise, end;
  • Step 408 For other SCells (ie, SCells that do not satisfy the condition in step 403), queue according to the load (for example, from large to small), and select SCell to perform explicit deactivation until the number of deactivated SCells reaches M. End.
  • This embodiment describes how to delete a SCell, as shown in Figure 9, including:
  • Step 501 Determine whether the quality of service of the SCell of the UE is lower than a set service quality threshold (QS scell ), and if yes, perform step 502; otherwise, end;
  • QS scell set service quality threshold
  • Step 502 The network side (such as an eNB) deletes the SCell.
  • the device includes a building module, a secondary cell selection module, and a management module, where:
  • the constructing module is configured to: after the UE with carrier aggregation capability initially accesses to a primary cell, construct a secondary cell candidate cell list for the UE;
  • the secondary cell selection module is configured to: select a secondary cell for the UE from the candidate cell candidate cell list constructed by the building module for the UE;
  • the management module is configured to: perform one or more of the following operations: deleting a secondary cell according to a quality of service of the secondary cell; adding a secondary cell according to a quality of service decision of the secondary cell; according to a buffer size of the UE, and a secondary cell Whether the channel quality and load decision activates the secondary cell; whether to deactivate the secondary cell according to the buffer size of the UE and the channel quality of the secondary cell. among them,
  • the management module is configured to delete the secondary cell according to the quality of service of the secondary cell in the following manner: when the service quality of the current secondary cell of the UE is lower than the quality of service threshold, the network side deletes the secondary cell;
  • the management module is configured to: add a secondary cell according to the quality of service of the UE in the following manner: when the quality of service of the cell in the candidate cell of the secondary cell is higher than the quality of service threshold and the current number of secondary cells of the UE does not reach the upper limit, The network side adds the cell to the secondary cell of the UE;
  • the management module is configured to activate the secondary cell according to the buffer size of the UE, the channel quality of the secondary cell, and the load decision in the following manner: when the buffer status report (BSR) of the UE reaches the first threshold of the BSR, and the current secondary cell
  • BSR buffer status report
  • CQI channel quality indicator
  • the management module is configured to deactivate the secondary cell according to the buffer size of the UE and the channel quality decision of the secondary cell in the following manner: when the buffer status report (BSR) of the UE is lower than the second threshold of the BSR and a secondary cell When the upper CQI is lower than the CQI second threshold, the network side explicitly deactivates the secondary cell.
  • BSR buffer status report
  • An embodiment of the present invention provides a method for carrier aggregation in an LTE-A system, including: after a user equipment (UE) having a carrier aggregation capability initially accesses a primary cell, the network side constructs a secondary cell candidate cell for the UE. List, and select a secondary cell for the UE from;
  • UE user equipment
  • the network side obtains one or more of the following operations according to the service quality decision of the secondary cell: deleting the secondary cell and adding the secondary cell.
  • the network side constructs a secondary cell candidate cell list for the UE, including:
  • the network side constructs a secondary cell candidate cell list for the UE according to one or more of the following neighboring cell lists of the primary cell: a same-frequency neighboring cell relationship list, a different-frequency neighboring cell relationship list, a same-covering neighboring cell relationship list, and a Relational neighbor list.
  • the network side deletes the secondary cell according to the service quality of the secondary cell, and the method includes: deleting, by the network side, the secondary cell when the service quality of the current secondary cell of the UE is lower than the service quality threshold.
  • the network side adds the secondary cell according to the service quality decision of the UE, and the method includes: when the quality of the cell in the candidate cell of the secondary cell is higher than the quality of service threshold and the current number of secondary cells of the UE If the upper limit is not reached, the network side adds the cell to the secondary cell of the UE.
  • the embodiment of the present invention further provides a method for carrier aggregation in an LTE-A system, including: after a user equipment (UE) having a carrier aggregation capability initially accesses a primary cell, the network side constructs a secondary cell candidate for the UE. a cell list, and selecting a secondary cell for the UE;
  • UE user equipment
  • the network side constructs a secondary cell candidate cell list for the UE, including:
  • the network side constructs a secondary cell candidate cell list for the UE according to one or more of the following neighboring cell lists of the primary cell: a same-frequency neighboring cell relationship list, a different-frequency neighboring cell relationship list, a same-covering neighboring cell relationship list, and a Relational neighbor list.
  • the network side determines the activation of the secondary cell according to the quality of service of the UE, including: when the buffer status report (BSR) of the UE reaches the first threshold of the BSR, and the channel quality indicator (CQI) on the current secondary cell reaches the CQI first. If the load of the secondary cell to be activated and the to-be-activated is less than the load threshold, the network side activates the secondary cell.
  • BSR buffer status report
  • CQI channel quality indicator
  • the network side deactivates the secondary cell according to the quality of service decision of the UE, including: when the buffer status report (BSR) of the UE is lower than the second threshold of the BSR, and the CQI of the secondary cell is lower than the second threshold of the CQI.
  • BSR buffer status report
  • the network side explicitly deactivates the secondary cell.
  • An embodiment of the present invention further provides an apparatus for implementing carrier aggregation in an LTE-A system, including a construction module, a secondary cell selection module, and a management module, where:
  • the constructing module is configured to: after the user equipment (UE) having the carrier aggregation capability is initially accessed into a primary cell, construct a secondary cell candidate cell list for the UE;
  • UE user equipment
  • the secondary cell selection module is configured to: select a secondary cell for the UE from the candidate cell candidate cell list constructed by the building module for the UE;
  • the management module is configured to: perform one or more of the following operations: deleting a secondary cell according to a quality of service decision of the secondary cell; adding a secondary cell according to a service quality decision of the secondary cell; Whether the buffer size, the channel quality of the secondary cell, and the load decision activate the secondary cell; whether to deactivate the secondary cell according to the buffer size of the UE and the channel quality of the secondary cell.
  • the management module is configured to delete the secondary cell according to the service quality of the secondary cell in the following manner, where: when the quality of service of the secondary secondary cell of the UE is lower than the quality of service threshold, the network side deletes the secondary cell; Or
  • the management module is configured to add a secondary cell according to the quality of service decision of the UE in the following manner, including: when the quality of service of the cell in the candidate cell of the secondary cell is higher than the quality of service threshold and the current number of secondary cells of the UE does not reach the upper limit. And the network side adds the cell to the secondary cell of the UE; or the management module is configured to: activate the secondary cell according to the quality of service of the UE in the following manner, including: when the buffer status report (BSR) of the UE reaches the BSR If the channel quality indicator (CQI) on the current secondary cell reaches the first threshold of the CQI and the load of the secondary cell to be activated is less than the load threshold, the network side activates the secondary cell; or
  • the management module is configured to deactivate the secondary cell according to the quality of service decision of the UE in the following manner, including: when the buffer status report (BSR) of the UE is lower than the second threshold of the BSR and the CQI of the secondary cell is lower than the CQI When the second threshold is reached, the network side explicitly deactivates the secondary cell.
  • BSR buffer status report
  • carrier aggregation can be reasonably selected and used in the LTE-A system. With greater bandwidth, system throughput is significantly improved. Therefore, the present invention has strong industrial applicability.

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Abstract

一种高级长期演进（LTE-A）系统中载波聚合的方法和装置，包括：具有载波聚合能力的用户设备（UE）初始接入到一主小区中后，网络侧为所述UE构建辅小区候选小区列表，并从所述辅小区候选小区列表中为所述UE选择辅小区；所述网络侧根据辅小区的服务质量决策对所述UE当前的辅小区采取以下操作：从所述UE当前的辅小区中删除相应的辅小区；或者，将相应的辅小区添加进所述UE当前的辅小区中。采用上述方案，在LTE-A系统中可以合理地选择和使用载波聚合，系统能够获取到更大带宽，系统吞吐量明显得到提升。

Description

一种 LTE-A系统中载波聚合的方法和装置
技术领域
本发明涉及无线通信领域， 具体涉及一种 LTE-A系统中载波聚合的方法 和装置。
背景技术
高级长期演进 ( LTE-A, Long-Term Evolution-Advanced )是第三代合作 伙伴计划（ 3GPP3M, Generation Partnership Project )为了满足高级国际移动通 信 ( IMT-Advanced, International Mobile Telecommunications Advanced ) 的需 求而在 LTE的基础上进行的技术演进，为了满足 IMT-A和未来通信对更大峰 值速率的要求， LTE-A支持最大 100MHz的带宽， 然而在现有的可用频谱资 源中很难找到如此大的带宽， 而且大带宽对于基站和终端的硬件设计带来很 大困难。 此外， 对于分散在多个频段上的频谱资源， 亟需一种技术把他们充 分利用起来。 发明内容
本发明要解决的技术问题是提供一种 LTE-A系统中载波聚合的方法和装 置， 以提供大带宽的频谱资源。
为解决上述技术问题， 本发明釆用如下技术方案：
一种高级长期演进（LTE-A ) 系统中载波聚合的方法， 包括：
具有载波聚合能力的用户设备 ( UE )初始接入到一主小区中后， 网络侧 为所述 UE构建辅小区候选小区列表， 并从所述辅小区候选小区列表中为所 述 UE选择辅小区；
所述网络侧根据辅小区的服务质量决策对所述 UE 当前的辅小区釆取以 下操作：
从所述 UE当前的辅小区中删除相应的辅小区； 或者，
将相应的辅小区添加进所述 UE当前的辅小区中。 其中， 网络侧为所述 UE构建辅小区候选小区列表的步骤包括： 所述网络侧 居所述主小区的以下邻区列表中的一个或几个为所述 UE 构建辅小区候选小区列表： 同频邻区关系列表、 异频邻区关系列表、 同覆盖 邻区关系列表、 包含关系邻区列表。
其中， 网络侧根据辅小区的服务质量决策从所述 UE 当前的辅小区中删 除相应的辅小区的步骤包括：
当所述 UE 当前的辅小区中某辅小区的服务质量低于服务质量门限时， 所述网络侧从所述 UE当前的辅小区中删除该辅小区。
其中， 网络侧根据所述 UE的服务质量决策将相应的辅小区添加进所述 UE当前的辅小区中的步骤包括：
当某辅小区候选小区中的辅小区的服务质量高于服务质量门限且 UE 当 前的辅小区数未达到上限值时， 所述网络侧将相应的辅小区添加进所述 UE 当前的辅小区中。
一种高级长期演进（LTE-A ) 系统中载波聚合的方法， 包括：
具有载波聚合能力的用户设备（UE )初始接入到一主小区中后， 网络侧 为所述 UE构建辅小区候选小区列表， 并从辅小区候选小区列表中为所述 UE 选择辅小区；
所述网络侧根据所述 UE的緩冲大小、 某辅小区的信道质量和负荷决策 是否激活所述 UE当前的辅小区列表中的该辅小区； 和 /或，
所述网络侧根据所述 UE的緩冲大小和某辅小区的信道质量决策是否去 激活所述 UE当前的辅小区中的该辅小区。
其中， 网络侧为所述 UE构建辅小区候选小区列表的步骤包括： 所述网络侧 居所述主小区的以下邻区列表中的一个或几个为所述 UE 构建辅小区候选小区列表： 同频邻区关系列表、 异频邻区关系列表、 同覆盖 邻区关系列表、 包含关系邻区列表。
其中， 所述网络侧根据所述 UE的緩冲大小、 某辅小区的信道质量和负 荷决策激活所述 UE当前的辅小区中的该辅小区的步骤包括： 当 UE的緩冲状态报告 ( BSR )达到 BSR第一阔值、 该辅小区上的信道 质量指示 （CQI )达到 CQI第一阔值且待激活的该辅小区的负荷小于负荷阔 值， 则所述网络侧激活该辅小区。
其中： 所述网络侧根据所述 UE的緩冲大小和某辅小区的信道质量决策 去激活所述 UE当前的辅小区中的该辅小区的步骤包括：
当所述 UE的 BSR低于 BSR第二阔值且该辅小区上的 CQI低于 CQI第 二阔值时， 所述网络侧显式地去激活该辅小区。
一种高级长期演进（LTE-A ) 系统中实现载波聚合的装置， 包括构建模 块、 辅小区选择模块和管理模块， 其中：
所述构建模块设置成： 在具有载波聚合能力的用户设备（UE )初始接入 到一主小区中后， 为所述 UE构建辅小区候选小区列表；
所述辅小区选择模块设置成： 从所述构建模块为所述 UE构建的辅小区 候选小区列表中为所述 UE选择辅小区；
所述管理模块设置成： 对所述 UE 当前的辅小区中的某辅小区执行以下 操作中的一种或几种：
根据所述 UE当前的辅小区中某辅小区的服务质量决策删除该辅小区； 根据某辅小区的服务质量决策将该辅小区添加进所述 UE 当前的辅小区 中；
根据所述 UE的緩冲大小、 某辅小区的信道质量和负荷决策是否激活所 述 UE当前的辅小区中的该辅小区；
根据所述 UE的緩冲大小和某辅小区的信道质量决策是否去激活所述 UE 当前的辅小区中的该辅小区。
其中：
所述管理模块设置成釆用以下方式决策删除某辅小区： 当所述 UE 当前 的辅小区中某辅小区的服务质量低于服务质量门限时，所述网络侧从所述 UE 当前的辅小区中删除该辅小区；
所述管理模块设置成釆用以下方式决策添加某辅小区： 当某辅小区候选 小区中的该辅小区的服务质量高于服务质量门限且所述 UE 当前的辅小区数 未达到上限值时， 所述网络侧将该辅小区添加进该所述 UE当前的辅小区中； 所述管理模块设置成釆用以下方式决策激活某辅小区： 当所述 UE的緩 冲状态报告 ( BSR )达到 BSR第一阔值、 某辅小区上的信道质量指示（CQI ) 达到 CQI第一阔值且待激活的该辅小区的负荷小于负荷阔值时， 所述网络侧 激活所述 UE当前的辅小区中的该辅小区； 或者，
所述管理模块设置成釆用以下方式决策去激活某辅小区： 当所述 UE的 BSR低于 BSR第二阔值且某辅小区上的 CQI低于 CQI第二阔值时， 所述网 络侧显式地去激活所述 UE当前的辅小区中的该辅小区。
釆用本发明实施例方法， 在 LTE-A系统中可以合理地选择和使用载波聚 合， 系统能够获取到更大带宽， 系统吞吐量明显得到提升。 附图概述
此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中：
图 1是带内连续载波聚合示意图；
图 2是带内非连续载波聚合示意图；
图 3是带间非连续载波聚合示意图；
图 4是本发明实施例的方法概述流程图；
图 5是本发明实施例 1的流程图；
图 6是本发明实施例 2的流程图；
图 7是本发明实施例 3的流程图；
图 8是本发明实施例 4的流程图；
图 9是本发明实施例 5的流程图；
图 10是本发明实施例 6的装置结构示意图。 本发明的较佳实施方式
载波聚合（CA, Carrier Aggregation )技术通过在频域上进行扩展， 以满 足系统对大带宽的需求。 CA是指基站将多个成分载波（CC , Composition Carrier )聚集起来一起为 UE提供服务， 其中， 聚集的 CC最多 5个， 每个最 多 20MHz, 频率上可以连续也可以分散。 载波聚合的场景可以分为 3种： 带 内连续载波聚合 (Intra-Band, Contiguous) (如图 1所示）、 带内非连续载波聚 合 (Intra-Band, Non-contiguous)(如图 2所示）、带外非连续载波聚合 (Inter-Band, Non-Contiguous)又称带间非连续载波聚合 (如图 3所示） 。 与 UE维持 RRC 连接的载波称之为主成分载波（PCC, Primary Composition Carrier ) , 简称主 载波， 或者为主服务小区 （PCell, Primary serving cell ) , 除主载波之外的载 波称之为辅成分载波（ SCC, Secondary Composition Carrier ) , 简称辅载波， 或者为辅小区（SCell, Secondary serving cell ) 。 PCC总是激活的， SCC可通 过 PCC或已激活的 SCC来激活。 SCC可通过 PCC或已激活的 SCC来去激活 ( Release; 包括自己） ， SCC还可以通过非连续接收（ DRXD, iscontinuous reception )和去活定时器 ( deactivation timer )来去激活。
在运营商具有多个频谱资源可用的条件下， 可应用 CA技术， 更加高效 利用运营商可获取的频谱资源。 需要说明的是， 由于载波聚合只能发生在多 个频段都能覆盖到的区域中， 因此本文主要针对运营商具有多个频谱资源可 用的场景。
下面对本发明提供的方法进行介绍， 如图 4所示， 包括以下步骤： 步骤 100: 具有载波聚合能力的用户设备（UE, User Equipment )初始接 入到一小区 （PCell ) 中后， 网络侧（例如 eNB )根据 PCell (即 UE接入的小 区） 的以下邻区关系列表中的一个或几个为该 UE构建 SCell候选小区列表： 同频邻区关系列表、 异频邻区关系列表、 同覆盖邻区关系列表、 包含关 系邻区列表；
其中，可将上述若干个邻区关系列表的并集作为该 UE的 SCell候选小区 列表。
步骤 200: eNB根据 UE能力结合 UE所支持的频点、 候选小区的服务质 量从 SCell候选小区列表中选出小区， 将选出的小区作为该 UE的 SCell; 具体如何根据 UE能力、 UE所支持的频点、 候选小区的服务质量信息来 选择小区可釆用现有技术实现， 本文不再赘述。
步骤 300-1： 根据候选 SCell的服务质量决策釆取以下操作中的一种或几 种：
删除 SCell, 添加 SCell。
步骤 300-2: 根据 UE的緩冲大小、 SCell的信道质量和负荷决策是否激 活辅小区。
步骤 300-3: 根据 UE的緩冲大小和 SCell的信道质量决策是否去激活辅 小区。
上述步骤 300-1、 300-2、 300-3可以在同一实施例中执行， 也可以分别在 三个实施例中执行， 即任意实施例可以包括步骤 100、 200和 300-1 , 或者包 括步骤 100、 200和 300-2, 或者包括步骤 100、 200和 300-3。 此外， 在一些 实施例中， 除了包括上述步骤 100和 200外， 还可以包括步骤 300-1、 300-2、 300-3中的任意组合，例如包括步骤 300-1和 300-2,或包括步骤 300-1和 300-3 , 或者包括步骤 300-2和 300-3。
其中：
当 UE当前某个 SCell的服务质量变差即低于预设的服务质量门限（例如
UE的移动导致） ， 则网络侧可以删除该 SCell;
当某个 SCell候选小区的服务质量较好， 即超过预定的服务质量阔值 ( QSsceii )且 UE 当前的 SCell数未达到上限（MAXscell ) , 则网络侧添加该 SCell候选小区为该 UE的 SCell;
当 UE的緩冲状态报告 ( BSR, Buffer Status Report )达到一预设的 BSR 第一阔值（ BSRm th )、 SCell上的信道质量指示（ CQI, Channel Quality Indicator ) 高于预设的 CQI第一阔值（CQIm— th )且待激活的 SCell的负荷小于预设的负 荷阔值（LOADth ) 时， 则激活 （或称启用）该 SCell; SCell激活后， 当 UE的 BSR低于一预设的 BSR第二阔值（ BSRLO— th )且 SCell上的 CQI低于预设的 CQI第二阔值（ CQI — th ) 时， 则显式地去激活该 SCell。
其中， 所述 BSR第一阔值大于 BSR第二阔值； CQI第一阔值大于 CQI 第二阔值。
根据下表确定激活或去激活 SCell的个数， 其中 BSR为当前 UE的緩冲 状态报告， Ni , N2分别为对应的需要激活和需要去激活的 SCell数。
表 1
Figure imgf000009_0001
为使本发明的目的、 技术方案和优点更加清楚明白， 下文中将结合附图 对本发明的实施例进行详细说明。 需要说明的是， 在不冲突的情况下， 本申 请中的实施例及实施例中的特征可以相互任意组合。 这些组合均在本发明的 保护范围内。
实施例 1
本实施例介绍如何为 UE选择 SCell, 如图 5所示， 包括：
步骤 101 , UE初始接入到一小区中 （PCell ) ；
步骤 102, 网络侧 （例如 eNB )根据 PCell (即 UE接入的小区） 的以下 邻区关系列表中的一个或几个构建该 UE的 SCell候选小区列表：
同频邻区关系列表、 异频邻区关系列表、 同覆盖邻区关系列表、 包含关 系邻区列表；
其中，如果只有一个邻区关系列表，则将该邻区关系列表作为 SCell候选 小区列表； 如果有多个邻区关系列表， 则将该多个邻区关系列表的并集作为 SCell候选小区列表。 步骤 103 , eNB根据 UE能力结合 UE所支持的频点、 当前 SCell的服务 质量信息从 SCell候选小区列表中选出小区， 将选出的小区作为该 UE 的 SCell。
实施例 2
上一实施例介绍初始接入时如何构建 SCell候选小区列表以及如何从候 选小区列表中选择 SCell, 本实施例在初始接入后如何添加 SCell, 本流程可 以定期执行， 如图 6所示， 包括：
步骤 201 , 从 SCell候选小区列表中选择一候选 SCell;
优选地， 可以按照某个顺序进行选择， 例如优先级顺序。
步骤 202,判断该候选 SCell的服务质量是否超过一设定的服务质量阔值 ( QSscell ) , 如果是， 执行步骤 203; 否则结束；
步骤 203 , 判断该 UE的当前 SCell数是否达到上限值（MAXscell ) , 如 果未达到， 则执行步骤 204; 如果达到则结束；
步骤 204 , 添加该小区为该 UE的 SCell后， 执行步骤 205；
步骤 205 , 判断是否已遍历完所有的 SCell候选小区， 如果是， 结束； 如 果没有则返回步骤 201 , 重新选择一个候选 SCell执行上述流程。
实施例 3
添加将候选 SCell中的 SCell添加为 SCell后， 还需要对该 SCell进行激 活后才能使用， 该些添加为 SCell的小区在为激活时可称为待激活 SCelL 本 实施例介绍如何激活 SCell, 如图 7所示， 包括：
步骤 301 , 判断 UE 当前的 BSR是否达到一预设的 BSR 第一阔值 ( BSRmjh ) , 如果是， 执行步骤 302; 否则结束；
由于 UE的 BSR代表该 UE的緩冲大小， 如果緩冲足够大， 则表示需要 启用辅载波来传输数据， 则进行 SCell的激活。
步骤 302 , 根据表 1确定需要激活的 SCell数 ； 步骤 303 , 判断待激活 SCell上的 CQI是否达到一预设的 CQI第一阔值 ( CQImjh ) , 如果是， 执行步骤 304; 否则执行步骤 305;
步骤 304,根据各待激活 SCell的 CQI的大小（例如由大到小）进行排序； 步骤 305, 判断是否判断完所有的待激活 SCell, 如果是， 执行步骤 306; 否则选择下一个 SCell, 返回步骤 303;
步骤 306, 从经过 CQI排序的 SCell中按顺序选择 SCell;
步骤 307， 判断所选择的 SCell的负荷是否小于负荷门限值 ( LOADth ) ， 如果是， 执行步骤 308; 否则， 返回步骤 306;
步骤 308, 判断已激活的 SCell数是否达到 ¾ , 如果未达到， 则执行步骤 309; 如果达到则结束；
步骤 309, 激活 （启用）该 SCell;
步骤 310, 判断是否还有待激活的 SCell, 如果有， 返回步骤 306; 否则 结束。
实施例 4
本实施例介绍如何去激活 SCell, 如图 8所示， 包括：
步骤 401 , 判断 UE 当前的 BSR是否低于一预设的 BSR 第二阔值 ( BSRLO_th ) , 如果是， 执行步骤 402; 否则结束；
步骤 402,根据表 1确定需要去激活的 SCell总数 N2, 再根据该 UE当前 已激活的 SCell数 K, 确定最终需要去激活的 SCell数 M;
具体地， M=min ( N2, K ) 。
步骤 403 , 判断待去激活 SCell上的 CQI是否低于一预设的 CQI第二阔 值（CQILO— th ) , 如果是， 执行步骤 404; 否则执行步骤 405;
步骤 404, 根据各待去激活 SCell的 CQI的大小（例如由小到大）进行排 序；
步骤 405, 判断是否已判断完所有的待去激活 SCell, 如果是， 执行步骤 406; 否则选择下一个 SCell, 返回步骤 403; 步骤 406, 从经过 CQI排序的 SCell中按顺序选择 SCell, 显式地去激活 该些 SCell;
如果经过 CQI排序的 SCell数大于 M个， 则从中选择前 M个 SCell进行 显式去激活， 如果小于 M个， 则将该些 SCell均进行显式去激活。
步骤 407, 判断已去激活的 SCell数是否未达到 M个， 如果是， 执行步 骤 408; 否则结束；
步骤 408, 对其它 SCell (即不满足步骤 403中条件的 SCell ) , 按照负荷 (例如由大到小）进行排队， 从中选择 SCell进行显式去激活， 直到已去激活 的 SCell数达到 M个， 结束。
实施例 5
本实施例介绍如何删除 SCell, 如图 9所示， 包括：
步骤 501 , 判断该 UE的 SCell的服务质量是否低于一设定的服务质量阔 值（QSscell ) , 如果是， 执行步骤 502; 否则结束；
步骤 502, 网络侧 （如 eNB )删除该 SCell。
实施例 6
本实施例描述实现载波聚合的装置， 如图 10所示， 包括构建模块、 辅小 区选择模块、 管理模块， 其中：
所述构建模块设置成： 在具有载波聚合能力的 UE初始接入到一主小区 中后， 为该 UE构建辅小区候选小区列表；
所述辅小区选择模块设置成： 从所述构建模块为该 UE构建的辅小区候 选小区列表中为该 UE选择辅小区；
所述管理模块设置成： 执行以下操作中的一种或几种： 根据辅小区的服 务质量决策删除辅小区； 根据辅小区的服务质量决策添加辅小区； 根据 UE 的緩冲大小、 辅小区的信道质量和负荷决策是否激活辅小区； 根据 UE的緩 冲大小和辅小区的信道质量决策是否去激活辅小区。 其中，
所述管理模块设置成釆用以下方式根据辅小区的服务质量决策删除辅小 区： 当 UE 当前某辅小区的服务质量低于服务质量门限时， 所述网络侧删除 该辅小区；
所述管理模块设置成釆用以下方式根据 UE的服务质量决策添加辅小区： 当某辅小区候选小区中的小区的服务质量高于服务质量门限且 UE 当前的辅 小区数未达到上限值， 则网络侧添加该小区为该 UE的辅小区；
所述管理模块设置成釆用以下方式根据 UE的緩冲大小、 辅小区的信道 质量和负荷决策激活辅小区： 当 UE的緩冲状态报告 ( BSR )达到 BSR第一 阔值、 当前辅小区上的信道质量指示 （CQI )达到 CQI第一阔值且待激活的 辅小区的负荷小于负荷阔值， 则网络侧激活该辅小区；
所述管理模块是设置成釆用以下方式根据 UE的緩冲大小和辅小区的信 道质量决策去激活辅小区： 当 UE的緩冲状态报告 ( BSR )低于 BSR第二阔 值且某辅小区上的 CQI低于 CQI第二阔值时，则网络侧显式地去激活该辅小 区。
本发明实施例提供了一种 LTE-A系统中载波聚合的方法， 包括： 具有载波聚合能力的用户设备 ( UE )初始接入到一主小区中后， 网络侧 为该 UE构建辅小区候选小区列表， 并从中为该 UE选择辅小区；
网络侧根据辅小区的服务质量决策釆取以下操作中的一种或几种： 删除 辅小区， 添加辅小区。
其中， 所述网络侧为该 UE构建辅小区候选小区列表， 包括：
所述网络侧根据主小区的以下邻区列表中的一个或几个为该 UE构建辅 小区候选小区列表： 同频邻区关系列表、 异频邻区关系列表、 同覆盖邻区关 系列表、 包含关系邻区列表。
其中， 所述网络侧根据辅小区的服务质量决策删除辅小区， 包括： 当 UE 当前某辅小区的服务质量低于服务质量门限时， 所述网络侧删除该辅小区。
其中， 所述网络侧根据 UE的服务质量决策添加辅小区， 包括： 当某辅 小区候选小区中的小区的服务质量高于服务质量门限且 UE 当前的辅小区数 未达到上限值， 则网络侧添加该小区为该 UE的辅小区。
本发明实施例还提供了一种 LTE-A系统中载波聚合的方法， 包括： 具有载波聚合能力的用户设备 ( UE )初始接入到一主小区中后， 网络侧 为该 UE构建辅小区候选小区列表， 并从中为该 UE选择辅小区；
根据 UE的緩冲大小、 辅小区的信道质量和负荷决策是否激活辅小区； 和 /或， 根据 UE的緩冲大小和辅小区的信道质量决策是否去激活辅小区。
其中， 所述网络侧为该 UE构建辅小区候选小区列表， 包括：
所述网络侧根据主小区的以下邻区列表中的一个或几个为该 UE构建辅 小区候选小区列表： 同频邻区关系列表、 异频邻区关系列表、 同覆盖邻区关 系列表、 包含关系邻区列表。
其中， 所述网络侧根据 UE 的服务质量决策激活辅小区， 包括： 当 UE 的緩冲状态报告 ( BSR )达到 BSR第一阔值、 当前辅小区上的信道质量指示 ( CQI )达到 CQI第一阔值且待激活的辅小区的负荷小于负荷阔值， 则网络 侧激活该辅小区。
其中， 所述网络侧根据 UE的服务质量决策去激活辅小区， 包括： 当 UE 的緩冲状态报告 ( BSR )低于 BSR第二阔值且某辅小区上的 CQI低于 CQI 第二阔值时， 则网络侧显式地去激活该辅小区。
本发明实施例还提供了一种 LTE-A系统中实现载波聚合的装置， 包括构 建模块、 辅小区选择模块和管理模块， 其中：
所述构建模块设置成： 在具有载波聚合能力的用户设备 ( UE )初始接入 到一主小区中后， 为该 UE构建辅小区候选小区列表；
所述辅小区选择模块设置成： 从所述构建模块为该 UE构建的辅小区候 选小区列表中为该 UE选择辅小区；
所述管理模块设置成： 执行以下操作中的一种或几种： 根据辅小区的服 务质量决策删除辅小区； 根据辅小区的服务质量决策添加辅小区； 根据 UE 的緩冲大小、 辅小区的信道质量和负荷决策是否激活辅小区； 根据 UE的緩 冲大小和辅小区的信道质量决策是否去激活辅小区。
其中， 所述管理模块设置成釆用以下方式根据辅小区的服务质量决策删 除辅小区， 包括： 当 UE 当前某辅小区的服务质量低于服务质量门限时， 所 述网络侧删除该辅小区； 或者
所述管理模块设置成釆用以下方式根据 UE的服务质量决策添加辅小区， 包括： 当某辅小区候选小区中的小区的服务质量高于服务质量门限且 UE 当 前的辅小区数未达到上限值， 则网络侧添加该小区为该 UE的辅小区； 或者 所述管理模块设置成釆用以下方式根据 UE的服务质量决策激活辅小区， 包括： 当 UE的緩冲状态报告（BSR )达到 BSR第一阔值、 当前辅小区上的 信道质量指示 （CQI )达到 CQI第一阔值且待激活的辅小区的负荷小于负荷 阔值， 则网络侧激活该辅小区； 或者
所述管理模块设置成釆用以下方式根据 UE的服务质量决策去激活辅小 区， 包括： 当 UE的緩冲状态报告 ( BSR )低于 BSR第二阔值且某辅小区上 的 CQI低于 CQI第二阔值时， 则网络侧显式地去激活该辅小区。
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 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
釆用上述方案， 在 LTE-A系统中可以合理地选择和使用载波聚合， 系统 能够获取到更大带宽， 系统吞吐量明显得到提升。 因此本发明具有很强的工 业实用性。

Claims

权 利 要 求 书
1、 一种高级长期演进（LTE-A ) 系统中载波聚合的方法， 包括： 具有载波聚合能力的用户设备 ( UE )初始接入到一主小区中后， 网络侧 为所述 UE构建辅小区候选小区列表， 并从所述辅小区候选小区列表中为所 述 UE选择辅小区；
所述网络侧根据辅小区的服务质量决策对所述 UE 当前的辅小区釆取以 下操作：
从所述 UE当前的辅小区中删除相应的辅小区； 或者，
将相应的辅小区添加进所述 UE当前的辅小区中。
2、 如权利要求 1所述的方法， 其中， 网络侧为所述 UE构建辅小区候选 小区列表的步骤包括：
所述网络侧 居所述主小区的以下邻区列表中的一个或几个为所述 UE 构建辅小区候选小区列表： 同频邻区关系列表、 异频邻区关系列表、 同覆盖 邻区关系列表、 包含关系邻区列表。
3、 如权利要求 1所述的方法， 其中， 网络侧根据辅小区的服务质量决策 从所述 UE当前的辅小区中删除相应的辅小区的步骤包括：
当所述 UE 当前的辅小区中某辅小区的服务质量低于服务质量门限时， 所述网络侧从所述 UE当前的辅小区中删除该辅小区。
4、 如权利要求 1或 3所述的方法， 其中， 网络侧根据所述 UE的服务质 量决策将相应的辅小区添加进所述 UE当前的辅小区中的步骤包括：
当某辅小区候选小区中的辅小区的服务质量高于服务质量门限且 UE 当 前的辅小区数未达到上限值时， 所述网络侧将相应的辅小区添加进所述 UE 当前的辅小区中。
5、 一种高级长期演进（LTE-A ) 系统中载波聚合的方法， 包括： 具有载波聚合能力的用户设备（UE )初始接入到一主小区中后， 网络侧 为所述 UE构建辅小区候选小区列表， 并从辅小区候选小区列表中为所述 UE 选择辅小区； 所述网络侧根据所述 UE的緩冲大小、 某辅小区的信道质量和负荷决策 是否激活所述 UE当前的辅小区列表中的该辅小区； 和 /或，
所述网络侧根据所述 UE的緩冲大小和某辅小区的信道质量决策是否去 激活所述 UE当前的辅小区中的该辅小区。
6、 如权利要求 5所述的方法， 其中， 网络侧为所述 UE构建辅小区候选 小区列表的步骤包括：
所述网络侧 居所述主小区的以下邻区列表中的一个或几个为所述 UE 构建辅小区候选小区列表： 同频邻区关系列表、 异频邻区关系列表、 同覆盖 邻区关系列表、 包含关系邻区列表。
7、 如权利要求 5所述的方法， 其中， 所述网络侧根据所述 UE的緩冲大 小、 某辅小区的信道质量和负荷决策激活所述 UE 当前的辅小区中的该辅小 区的步骤包括：
当 UE的緩冲状态报告 ( BSR )达到 BSR第一阔值、 该辅小区上的信道 质量指示 （CQI )达到 CQI第一阔值且待激活的该辅小区的负荷小于负荷阔 值， 则所述网络侧激活该辅小区。
8、 如权利要求 5或 7所述的方法， 其中： 所述网络侧根据所述 UE的緩 冲大小和某辅小区的信道质量决策去激活所述 UE 当前的辅小区中的该辅小 区的步骤包括：
当所述 UE的 BSR低于 BSR第二阔值且该辅小区上的 CQI低于 CQI第 二阔值时， 所述网络侧显式地去激活该辅小区。
9、 一种高级长期演进（LTE-A ) 系统中实现载波聚合的装置， 包括构建 模块、 辅小区选择模块和管理模块， 其中：
所述构建模块设置成： 在具有载波聚合能力的用户设备 ( UE )初始接入 到一主小区中后， 为所述 UE构建辅小区候选小区列表；
所述辅小区选择模块设置成： 从所述构建模块为所述 UE构建的辅小区 候选小区列表中为所述 UE选择辅小区；
所述管理模块设置成： 对所述 UE 当前的辅小区中的某辅小区执行以下 操作中的一种或几种： 根据所述 UE当前的辅小区中某辅小区的服务质量决策删除该辅小区； 根据某辅小区的服务质量决策将该辅小区添加进所述 UE 当前的辅小区 中；
根据所述 UE的緩冲大小、 某辅小区的信道质量和负荷决策是否激活所 述 UE当前的辅小区中的该辅小区；
根据所述 UE的緩冲大小和某辅小区的信道质量决策是否去激活所述 UE 当前的辅小区中的该辅小区。
10、 如权利要求 9所述的装置， 其中：
所述管理模块设置成釆用以下方式决策删除某辅小区： 当所述 UE 当前 的辅小区中某辅小区的服务质量低于服务质量门限时，所述网络侧从所述 UE 当前的辅小区中删除该辅小区；
所述管理模块设置成釆用以下方式决策添加某辅小区： 当某辅小区候选 小区中的该辅小区的服务质量高于服务质量门限且所述 UE 当前的辅小区数 未达到上限值时， 所述网络侧将该辅小区添加进该所述 UE当前的辅小区中； 所述管理模块设置成釆用以下方式决策激活某辅小区： 当所述 UE的緩 冲状态报告 ( BSR )达到 BSR第一阔值、 某辅小区上的信道质量指示（CQI ) 达到 CQI第一阔值且待激活的该辅小区的负荷小于负荷阔值时， 所述网络侧 激活所述 UE当前的辅小区中的该辅小区； 或者，
所述管理模块设置成釆用以下方式决策去激活某辅小区： 当所述 UE的 BSR低于 BSR第二阔值且某辅小区上的 CQI低于 CQI第二阔值时， 所述网 络侧显式地去激活所述 UE当前的辅小区中的该辅小区。
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