WO2012159462A1 - 一种基于comp的空口拥塞控制方法及系统 - Google Patents

一种基于comp的空口拥塞控制方法及系统 Download PDF

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Publication number
WO2012159462A1
WO2012159462A1 PCT/CN2012/071357 CN2012071357W WO2012159462A1 WO 2012159462 A1 WO2012159462 A1 WO 2012159462A1 CN 2012071357 W CN2012071357 W CN 2012071357W WO 2012159462 A1 WO2012159462 A1 WO 2012159462A1
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Prior art keywords
air interface
cell
coordinated
interface resources
primary cell
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PCT/CN2012/071357
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English (en)
French (fr)
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李子帅
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中兴通讯股份有限公司
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Publication of WO2012159462A1 publication Critical patent/WO2012159462A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H04J11/0053—Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception

Definitions

  • the present invention relates to an air interface congestion control technology for a communication system, and more particularly to a method and system for air interface congestion control based on CoMP (Cooperative Multi-Point). Scenery technology
  • CoMP Cooperative Multi-Point
  • ComMP Coordinated Multi-point transmission/reception
  • LTE Long-Term Evolution
  • LTE-advanced advanced long-term evolution
  • ComMP refers to the geographical transmission of multiple transmission points to participate in data transmission/reception of a user equipment (UE, User Equipment) to improve the signal quality of edge users, increase the coverage of high-speed data rates, and improve the throughput of cell edges. Volume or increase system throughput.
  • LTE Long Term Evolution
  • CoMP technology can be used to simultaneously serve multiple UEs for one UE.
  • the air interface congestion control technology is used to deal with services that fail to accept for the first time due to insufficient air interface resources.
  • the air interface congestion control technology for the LTE system for a scenario in which a cell provides services to the UE, cancels the air interface congestion by removing the bearer of the low priority service and releasing the resources, to accept the current service, or by reducing the quality of service (QoS, Quality of Service and release of resources to relieve air traffic congestion to accept current services, not only cause UEs to be robbed, but also require UEs to participate in the congestion control process, resulting in cumbersome congestion control procedures and reducing QoS of UE services.
  • QoS Quality of Service
  • the existing air interface congestion control technology cannot integrate the resources of multiple cells, and therefore cannot be applied to scenarios in which multiple cells simultaneously provide services for the UE. It is necessary to propose a LTE-A system that can be applied to CoMP-based systems. Air interface congestion control technology. Summary of the invention
  • the main object of the present invention is to provide a CoMP-based congestion control method and system capable of implementing air interface congestion control of a CoMP-based LTE-A system.
  • the present invention provides a CoMP-based congestion control method, the method includes: the primary cell integrates itself according to the air interface resources required for releasing the current congestion, and the channel quality information and remaining air interface resources of the self and each coordinated cell, and the The air interface resources of each coordinated cell, and adjust the resource scheduling of itself and each coordinated cell.
  • the method further includes: the primary cell acquiring channel quality information and remaining air interface resources of each coordinated cell.
  • the primary cell acquires channel quality information and remaining air resource of each coordinated cell, where: each coordinated cell periodically feeds back its own channel quality information and remaining air interface resources to the primary cell.
  • the method further includes: when the current congestion occurs when the primary cell establishes a service, the primary cell records the air interface resources required to cancel the current congestion.
  • the method further includes: when the current congestion occurs when a coordinated cell establishes a service, the coordinated cell sends a congestion control request to the primary cell, where the congestion control request includes an air interface required to cancel the current congestion. Resources.
  • the primary cell integration itself and the air interface resources of the coordinated cells include: the primary cell statistics itself and the remaining air interface resources of the coordinated cells, and verify whether all remaining air interface resources obtained by the statistics are not less than The air interface resource required for the current congestion is removed.
  • the primary cell adjusts the resource allocation of the current and the coordinated resources of the coordinated cell, and includes: when all the remaining air interface resources obtained by the primary cell verification and statistics are not less than the air interface resources required for releasing the current congestion. Recalling the remaining air interface resources of the self and/or the coordinated cells to cause the current congestion Business.
  • the calling the remaining air interface resource scheduling of the self and/or the coordinated cells causes the current congested service, where: the current congestion occurs when the primary cell establishes a service, and the primary cell invokes the foregoing
  • the remaining air interface resource scheduling of the coordinated cell causes the currently congested service.
  • the calling of the remaining air interface resource scheduling of the self and/or the coordinated cells causes the current congested service
  • the main cell calls the remaining of the current cell when the current congestion occurs in a coordinated cell to establish a service.
  • the air interface resource and the remaining air interface resources of each coordinated cell except the cooperating cell in which the congestion occurs are scheduled to cause the current congested service.
  • the method further includes: after the current congestion is released, the primary cell re-adjusts itself according to its air interface resource and channel quality information, and acquired channel quality information and remaining air interface resources of each coordinated cell. Resource scheduling for each coordinated cell.
  • the primary cell re-adjusts the resource scheduling allocation of itself and each coordinated cell according to its own air interface resource and channel quality information, and the obtained channel quality information and remaining air interface resources of each coordinated cell, including: The primary cell integrates the air interface resources of itself and each coordinated cell according to its own air interface resource and channel quality information, and the obtained channel quality information and remaining air interface resources of each coordinated cell, and adjusts the resource scheduling of itself and each coordinated cell, and will adjust The obtained call result is notified to each coordinated cell.
  • the present invention also provides a CoMP-based congestion control system, where the system includes: a primary cell and each coordinated cell, where the primary cell is used for air interface resources required to release current congestion, and itself and each of the foregoing
  • the channel quality information and the remaining air interface resources of the coordinated cell are integrated with the air interface resources of the coordinated cells, and the resource scheduling of the cooperative cells is adjusted.
  • the primary cell includes an acquiring unit, configured to acquire channel quality information and remaining air interface resources of the coordinated cells.
  • each coordinated cell includes a feedback unit, configured to periodically The primary cell feeds back its own channel quality information and remaining air interface resources;
  • the acquiring unit of the primary cell is further configured to receive channel quality information and remaining air interface resources that are fed back by the coordinated cells.
  • the feedback unit of each coordinated cell is further configured to send a congestion control request to the primary cell when the current congestion occurs to establish a service, and the congestion control request includes an air interface required to cancel the current congestion.
  • the acquiring unit of the primary cell is further configured to receive a congestion control request sent by each coordinated cell;
  • the primary cell further includes a recording unit, configured to record, when the current congestion occurs in establishing a service by itself, the air interface resource required for releasing the current congestion.
  • the primary cell includes: an integration unit and an adjustment unit, where the integration unit is configured to count the remaining air interface resources of the primary cell and each coordinated cell, and verify whether all remaining air interface resources obtained by the statistics are not less than the current congestion. The required air interface resource, and notifying the adjustment unit of the result of the verification;
  • an adjustment unit configured to invoke the remaining air interface resource scheduling to cause the current congested service when the result of the verification by the integration unit is that the remaining air resources obtained by the statistics are not less than the air interface resources required for releasing the current congestion.
  • the primary cell is further configured to re-adjust itself and each collaboration according to its air interface resource and channel quality information, and acquired channel quality information of each coordinated cell and remaining air interface resources after the current congestion is released. Resource scheduling of the cell.
  • the primary cell integrates the remaining air interface resources of itself and each coordinated cell, adjusts the resource scheduling of itself and each coordinated cell, and allocates air slots required for scheduling services for causing congestion.
  • the resource is used to cancel the congestion of the air interface.
  • the present invention does not need to rob the UE service, nor does it reduce the QoS of the UE service, does not require the participation of the UE, has a simple congestion control process, and is also implemented.
  • the air interface congestion control of the LTE-A system can effectively improve the overall throughput of the system.
  • FIG. 1 is a flowchart of an implementation of a CoMP-based congestion control method according to the present invention
  • FIG. 3 is a flowchart of implementing congestion control based on CoMP in Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of implementing congestion control based on CoMP in Embodiment 2 of the present invention
  • FIG. 4 is a flowchart of LTE-A system according to Embodiment 3 of the present invention
  • the basic idea of the present invention is:
  • the primary cell integrates the resources of each cell in the current CoMP cell group according to the air interface resources required for mitigating congestion, the current channel quality and remaining air interface resources, and the channel quality and remaining air interface resources of each coordinated cell.
  • the resource scheduling of each cell in the CoMP cell set is adjusted, and the air interface resource is allocated for the service that causes congestion, and the purpose of mitigating air interface congestion and successfully accepting the current service bearer is achieved.
  • the current CoMP cell set is a cell set including the primary cell and each coordinated cell.
  • the CoMP-based congestion control method of the present invention can mainly include the following steps:
  • Step 101 The primary cell acquires channel quality information and remaining air interface resources of each coordinated cell. Specifically, each coordinated cell periodically feeds back its own channel quality information and remaining air interface resources to the primary cell.
  • Step 102 The primary cell integrates the air interface resources required by the current congestion, the channel quality information of the self and each coordinated cell, and the remaining air interface resources, integrates the air interface resources of the self and the coordinated cells, and adjusts itself and each collaboration. Resource scheduling of the cell.
  • the air interface resource specifically refers to an air interface resource block (RB, Resource Block), and the remaining air interface resources, that is, the number of remaining RBs, and the number of RBs required to cancel the current congestion, that is, the number of RBs required to cancel the current congestion.
  • the channel quality information may include parameters such as an uplink channel quality indicator (CQI, channel quality index) and a signal to interference ratio (SINR).
  • the primary cell When the current congestion occurs in the primary cell to establish a service, the primary cell records the air interface resources required to cancel the current congestion; when the current congestion occurs in a coordinated cell to establish a service, the coordinated cell to the primary cell A congestion control request is sent, where the congestion control request includes an air interface resource required to cancel the current congestion.
  • the primary cell counts itself and the remaining air interface resources of each coordinated cell, and verifies whether all the remaining air interface resources obtained by the statistics are not less than the air interface resources required for releasing the current congestion, and all remaining air interface resources obtained by the verification statistics are not less than
  • the remaining air interface resources of the self and/or the coordinated cells are called to cause the current congested service; when all the remaining air interface resources obtained by the verification statistics are smaller than the air interface resources required for releasing the current congestion, , ends the current congestion control, and the congestion control fails.
  • the primary cell When the current congestion occurs in a coordinated cell to establish a service, the primary cell calls its own remaining air interface resources, and the remaining air interface resource scheduling of each coordinated cell other than the coordinated coordinated cell causes the currently congested service. When the current congestion occurs in the primary cell to establish a service, the primary cell invokes the remaining air interface resource scheduling of the coordinated cells to cause the current congested service. In this way, while ensuring the QoS of each cell in the current CoMP cell set, the air resource of the cell other than the cell in which the air interface is congested is concentrated in the current CoMP cell, so that the remaining air interface resources can be utilized reasonably and effectively.
  • the primary cell allocates an air interface resource for releasing the current congestion from all the remaining air interface resources obtained by the statistics, obtains a call result of the remaining air interface resource, and notifies the call result of the remaining air interface resource to the Each coordinated cell; according to the result of the call of the remaining air interface resources, the primary cell and/or each coordinated cell invokes its own remaining air interface resource to schedule the service that causes the current congestion.
  • the current congestion occurs when the primary cell establishes a service, and the primary cell allocates air interface resources for releasing the current congestion from the remaining air interface resources of all the coordinated cells, obtains a call result of the remaining air interface resources, and uses the remaining air interface resources.
  • the result of the call is notified to the coordinated cells. According to the result of the call of the remaining air interface resources, each coordinated cell invokes its remaining air interface resources to perform scheduling of the primary cell service.
  • the primary cell allocates the remaining air interface resources of the self, and the remaining air interface resources of the other coordinated cells except the coordinated cell in which the congestion occurs, to allocate the current congestion.
  • the air interface resource obtains the result of the call of the remaining air interface resource, and notifies the coordinated cell of the result of the call of the remaining air interface resource; according to the result of the call of the remaining air interface resource, the primary cell and/or the congestion.
  • Each of the cooperative cells outside the coordinated cell invokes its own remaining air interface resource to schedule the cooperating coordinated cell service.
  • the calling result includes the primary cell and/or each coordinated cell used to schedule air interface resources that cause current congestion services.
  • the call result may be a downlink control information (DCI, Downlink Control Information), and the DCI may include an air interface RB and a modulation and coding scheme (MCS, Modulation) used by each cell in the current CoMP cell set to schedule the current congestion service.
  • DCI downlink control information
  • MCS modulation and coding scheme
  • the primary cell may notify the coordinated cells of the result of the call of the remaining air interface resources by using an X2 interface message.
  • the primary cell may further adjust its own resource scheduling of each coordinated cell according to its air interface resource and channel quality information, and the acquired channel quality information and remaining air interface resources of each coordinated cell.
  • the primary cell integrates the air interface resources of the self and each coordinated cell according to the air interface resource and the channel quality information, and the obtained channel quality information of each coordinated cell and the remaining air interface resources, and adjusts itself and each coordinated cell.
  • Resource scheduling will adjust the resulting call junction
  • the result of the call here includes the primary cell and the air interface resource used by each coordinated cell for the current service scheduling. In this way, it is possible to timely and effectively alleviate the imbalance of air interface resource allocation that may occur after the release of air interface congestion.
  • the present invention further provides a CoMP-based congestion control system, where the system mainly includes: a primary cell and each coordinated cell, where the primary cell is used for air interface resources required to release current congestion, and The channel quality information and the remaining air interface resources of the self and the coordinated cells are integrated, and the air interface resources of the coordinated cells are integrated, and the resource scheduling of the self and the coordinated cells are adjusted.
  • the primary cell includes an acquiring unit, configured to acquire channel quality information and remaining air interface resources of the coordinated cells.
  • Each of the coordinated cells includes a feedback unit, configured to periodically feed back the channel quality information and the remaining air interface resources to the primary cell, where the acquiring unit of the primary cell is further configured to receive the feedback of the coordinated cells. Channel quality information and remaining air interface resources.
  • the primary cell further includes: an integration unit and an adjustment unit, where the integration unit is configured to collect statistics on the remaining air interface resources of the primary cell and each coordinated cell, and verify whether all remaining air interface resources obtained by the statistics are not less than the current congestion. The required air interface resource, and the result of the verification is notified to the adjustment unit; the adjustment unit is configured to: when the result of the verification by the integration unit is that all the remaining air interface resources obtained by the statistics are not less than the air interface resources required for releasing the current congestion, Invoking the remaining air interface resource scheduling causes the currently congested service.
  • the integration unit is configured to collect the remaining air interface resources of the primary cell and the remaining air interface resources of each coordinated cell obtained by the acquiring unit, to obtain all remaining air resources that are currently available.
  • the adjusting unit is further configured to end the current congestion control process when the result of the verification by the integration unit is that all the remaining air interface resources obtained by the statistics are smaller than the air interface resources required for releasing the current congestion.
  • the feedback unit of each coordinated cell may be further configured to send a congestion control request to the primary cell when the current congestion occurs, and the congestion control request includes the air interface resource required for releasing the current congestion;
  • the acquiring unit of the primary cell may be further configured to receive a congestion control request sent by each coordinated cell; and/or the primary cell further includes a recording unit, configured to record when the current congestion occurs in establishing a service by itself Remove the air interface resources needed for current congestion.
  • the primary cell is further configured to: after the current congestion is released, re-adjust the resource scheduling of the self and the coordinated cells according to the air interface resource and the channel quality information, and the obtained channel quality information of each coordinated cell and the remaining air interface resources. .
  • Step 201 Each coordinated cell in the current CoMP cell set periodically feeds back its own channel quality information and remaining air interface resources to the primary cell according to a preset time period.
  • each coordinated cell feeds back to the primary cell the channel quality information including its own CQI, SINR, and the like, and the number of remaining RBs.
  • Step 202 The primary cell receives an E-UTRAN TELUP SETUP REQUEST message sent by the core network, triggers the primary cell to accept a service of the UE, and then receives the UE.
  • the primary cell records the air interface resources required to cancel the air interface congestion, and according to its current channel quality information and remaining air interface resources, and the channel quality information and remaining air interface resources that are fed back from each coordinated cell. Integrate the remaining air interface resources of the current CoMP cell set, adjust the resource scheduling of itself and each coordinated cell, and successfully cancel the congestion.
  • the primary cell records the number of air interface RBs required to cancel the air interface congestion, integrates the remaining air interface resources of itself and each coordinated cell, and obtains the total number of remaining RBs currently available, and It is verified that the number of all remaining RBs that are currently available is not less than the number of air interface RBs required to cancel the congestion of the air interface.
  • the RBs for performing scheduling of the congestion service are allocated from the remaining RBs of the coordinated cells, and the remaining RBs are obtained. The result is called and notified to each coordinated cell, and each coordinated cell uses the call result to call its own remaining RB to call the service.
  • the resource scheduling of the primary cell is reduced or the resource scheduling of the primary cell is stopped, and the remaining resources of each coordinated cell are collectively invoked to achieve the purpose of releasing the air interface congestion and successfully receiving the bearer.
  • Step 203 After the congestion is successfully cancelled, the primary cell sends an RRC reconfiguration (RRCConnectionReconfiguration) message to the UE, triggering the establishment process of the service.
  • RRC reconfiguration RRCConnectionReconfiguration
  • Step 204 After the service is successfully established, the primary cell returns an E-RAB SETUP RESPONSE message to the core network to notify the core network that the bearer establishment of the service is successful.
  • Step 205 The primary cell according to itself and each coordinated cell The channel quality information and the remaining air interface resources re-adjust the resource scheduling of each cell in the CoMP cell set.
  • the primary cell integrates the air interface resources of itself and each coordinated cell according to the channel quality information of the own and each coordinated cell and the remaining air interface resources, and adjusts the air interface resource allocation of the current service scheduling of the UE and the coordinated cells.
  • Step 301 The same as step 201;
  • Step 302 After receiving a bearer setup request message sent by the core network, a coordinated cell in the current CoMP cell set receives a traffic congestion when receiving a service of the UE, and the coordinated cell sends a congestion control request to the primary cell, where the congestion control request includes There are air interface resources needed to release current congestion, and channel quality information and remaining air interface resources of the coordinated cell.
  • Step 303 After receiving the congestion control request sent by the coordinated cell, the primary cell according to the upper Channel quality information and remaining air interface resources of each coordinated cell received, and its own channel quality information and remaining air interface resources, integrating the remaining air interface resources of the current CoMP cell set, adjusting the resource scheduling of itself and each coordinated cell, and succeeding Notifying the coordinated cell after the congestion is released;
  • the primary cell obtains the number of air interface RBs required to cancel the air interface congestion from the congestion control request, integrates the remaining air interface resources of the self and each coordinated cell, and obtains all remaining RB numbers currently available, and obtains the current current risk number.
  • the number of all remaining RBs that are available is not less than the number of air interface RBs required to cancel the congestion of the air interface.
  • the remaining RBs of the self and the current CoMP cell set are divided by the coordinated cells other than the coordinated cell in which the congestion occurs.
  • the RBs for performing the scheduling of the congestion service are allocated, and the result of the call of the remaining RBs is obtained, and the coordinated CoMP cells are notified to the other coordinated cells except the coordinated cell in which the congestion occurs, the primary cell.
  • each of the coordinated cells in the current CoMP cell set except the cooperating cell that is congested adopts the call result, and calls the remaining RBs of the current CoMP cell to perform the call of the service.
  • the coordinated cell that is congested does not perform resource scheduling or resource scheduling, so as to alleviate the congestion of the air interface resource and successfully accept the bearer.
  • Step 304 After the congestion is successfully cancelled, the cooperating cell that sends the congestion sends an RRCConnectionReconfiguration message to the UE, triggering the establishment process of the service.
  • Step 305 After the service is successfully established, the coordinated cell returns a bearer setup response message to the core network, to notify the core network that the establishment is successful.
  • Step 306 It is exactly the same as step 205.
  • the process of performing air interface congestion control on the LTE-A system may mainly include the following steps:
  • Step 401 The E-UTRAN radio access bearer (E-RAB, E-UTRAN Radio Access) sent by the cell receiving mobility management device (MME, Mobility Management Entity) Bearer) establishes a request;
  • E-RAB E-UTRAN Radio Access
  • MME Mobility Management Entity
  • Step 402 When the cell establishes the E-RAB, air interface congestion occurs.
  • Step 403 Verify whether the cell is a CoMP cell, and if yes, proceed to step 404, otherwise, proceed directly to step 405;
  • Step 404 Perform CoMP-based congestion control processing on the cell, if the congestion is successfully cancelled, and the E-RAB is successfully received, proceed to step 406; if the congestion is not successfully cancelled, proceed to step 405;
  • the process of the first embodiment may be used to implement the process. If the cell is a coordinated cell, the process of the second embodiment may be used.
  • Step 405 Perform congestion control processing on the existing LTE system on the cell. If the congestion is successfully cancelled and the E-RAB is successfully received, proceed to step 406. If the congestion is not successfully cancelled, the E-RAB fails to be accepted. End the current process;
  • Step 406 The cell returns a response message that the E-RAB is successfully established to the MME, and ends the current process.

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Abstract

本发明公开了一种基于CoMP的拥塞控制方法，所述方法包括：主小区根据解除当前拥塞所需要的空口资源、以及自身和各协作小区的信道质量信息和剩余空口资源，整合自身以及所述各协作小区的空口资源，并调整自身以及各协作小区的资源调度。本发明还公开了一种基于CoMP的拥塞控制系统，本发明既不需要抢拆UE业务，也不会降低UE业务的QoS，不需要UE的参与，拥塞控制流程简单，并且还实现了对基于CoMP的LTE-A系统的空口拥塞控制，能够有效提高系统的整体吞吐量。

Description

一种基于 CoMP的空口拥塞控制方法及系统 技术领域
本发明涉及通信系统的空口拥塞控制技术， 尤其涉及一种基于 作（CoMP, Cooperative Multi-Point ) 的空口拥塞控制方法及系统。 皆景技术
多点协作传输及接收技术 ( ComMP , Coordinated Multi-point transmission/reception ) 是为了进一步改善长期演进 ( LTE , Long-Term Evolution ) 系统对于边缘用户吞吐量、 边缘用户频率利用率以及系统整体 性能而提出的，也是高级长期演进（LTE-advanced )中的重要元素。 ComMP 是指地理位置上分离的多个传输点协同参与一个用户设备 （UE , User Equipment )的数据传输 /接收， 以提高边缘用户的信号质量， 增加高速数据 速率的覆盖， 以及提高小区边缘的吞吐量或增加系统吞吐量。
LTE系统中， 同一时间只有一个小区为一个 UE服务， 在 LTE-A系统 中， 采用 CoMP技术可以实现多个小区同时为一个 UE服务。
空口拥塞控制技术用于处理由于空口资源不足而初次接纳失败的业 务。 用于 LTE系统的空口拥塞控制技术， 针对一个小区对 UE提供服务的 情景， 通过将低优先级业务的承载拆除并释放资源来解除空口拥塞， 以接 纳当前业务， 或者通过降低服务质量（QoS, Quality of Service )并释放资 源来解除空口拥塞， 以接纳当前业务， 不仅会造成 UE的业务被抢拆， 而且 需要 UE参与到拥塞控制流程而导致拥塞控制流程繁瑣， 并且还会降低 UE 业务的 QoS , 现有的空口拥塞控制技术由于不能对多个小区的资源进行整 合， 因此， 也不能应用于多个小区同时为 UE提供服务的场景， 需要提出一 种能够适用于基于 CoMP的 LTE-A系统的空口拥塞控制技术。 发明内容
有鉴于此， 本发明的主要目的在于提供一种基于 CoMP的拥塞控制方 法及系统， 能够实现基于 CoMP的 LTE-A系统的空口拥塞控制。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供了一种基于 CoMP的拥塞控制方法， 所述方法包括： 主小区根据解除当前拥塞所需要的空口资源、 以及自身和各协作小区 的信道质量信息和剩余空口资源， 整合自身以及所述各协作小区的空口资 源， 并调整自身以及各协作小区的资源调度。
在上述方案中， 在所述主小区整合自身以及所述各协作小区的空口资 源之前， 所述方法还包括： 所述主小区获取各协作小区的信道质量信息和 剩余空口资源。
在上述方案中， 所述主小区获取各协作小区的信道质量信息和剩余空 口资源， 为： 所述各协作小区周期性地向所述主小区反馈自身的信道质量 信息和剩余空口资源。
在上述方案中， 所述方法还包括： 当前拥塞发生在所述主小区建立业 务时， 所述主小区记录解除当前拥塞所需要的空口资源。
在上述方案中， 所述方法还包括： 当前拥塞发生在一个协作小区建立 业务时， 所述协作小区向所述主小区发送拥塞控制请求， 所述拥塞控制请 求包含有解除当前拥塞所需要的空口资源。
在上述方案中， 所述主小区整合自身以及所述各协作小区的空口资源， 包括： 所述主小区统计自身以及各协作小区的剩余空口资源， 并验证统计 得到的所有剩余空口资源是否不小于解除当前拥塞所需要的空口资源； 所 述主小区调整自身以及各协作小区的资源调度分配， 包括： 在所述主小区 验证统计得到的所有剩余空口资源不小于解除当前拥塞所需要的空口资源 时， 调用自身和 /或所述各协作小区的剩余空口资源调度引起当前拥塞的业 务。
在上述方案中， 所述调用自身和 /或所述各协作小区的剩余空口资源调 度引起当前拥塞的业务， 为： 当前拥塞发生在所述主小区建立业务时， 所 述主小区调用所述各协作小区的剩余空口资源调度引起当前拥塞的业务。
在上述方案中， 所述调用自身和 /或所述各协作小区的剩余空口资源调 度引起当前拥塞的业务， 为： 在当前拥塞发生在一个协作小区建立业务时， 所述主小区调用自身的剩余空口资源、 以及除发生拥塞的协作小区之外的 其他各协作小区的剩余空口资源进行引起当前拥塞的业务的调度。
在上述方案中， 所述方法还包括： 在解除当前拥塞后， 所述主小区根 据自身的空口资源和信道质量信息、 以及获取的各协作小区的信道质量信 息和剩余空口资源， 重新调整自身以及各协作小区的资源调度。
在上述方案中， 所述主小区根据自身的空口资源和信道质量信息、 以 及获取的各协作小区的信道质量信息和剩余空口资源， 重新调整自身以及 各协作小区的资源调度分配， 包括： 所述主小区根据自身的空口资源和信 道质量信息、 以及获取的各协作小区的信道质量信息和剩余空口资源， 整 合自身及各协作小区的空口资源， 并调整自身以及各协作小区的资源调度， 将调整得到的调用结果通知给所述各协作小区。
本发明还提供了一种基于 CoMP的拥塞控制系统， 所述系统包括： 主 小区和各协作小区， 其中， 所述主小区用于根据解除当前拥塞所需要的空 口资源、 以及自身和所述各协作小区的信道质量信息和剩余空口资源， 整 合自身以及所述各协作小区的空口资源， 并调整自身以及所述各协作小区 的资源调度。
在上述方案中， 所述主小区包括获取单元， 用于获取所述各协作小区 的信道质量信息和剩余空口资源。
在上述方案中， 所述各协作小区包括反馈单元， 用于周期性地向所述 主小区反馈自身的信道质量信息和剩余空口资源；
所述主小区的获取单元还用于接收所述各协作小区反馈的信道质量信 息和剩余空口资源。
在上述方案中， 所述各协作小区的反馈单元， 还用于在当前拥塞发生 自身建立业务时， 向所述主小区发送拥塞控制请求， 所述拥塞控制请求包 含有解除当前拥塞所需要的空口资源；
所述主小区的获取单元， 还用于接收所述各协作小区发送的拥塞控制 请求；
和 /或， 所述主小区还包括记录单元， 用于在当前拥塞发生在自身建立 业务时， 记录解除当前拥塞所需要的空口资源。
在上述方案中， 所述主小区包括： 整合单元和调整单元， 其中， 整合单元， 用于统计主小区以及各协作小区的剩余空口资源， 验证统 计得到的所有剩余空口资源是否不小于解除当前拥塞所需要的空口资源， 并将验证的结果通知给所述调整单元；
调整单元， 用于在所述整合单元验证的结果为统计得到的所有剩余空 口资源不小于解除当前拥塞所需要的空口资源时， 调用所述剩余空口资源 调度引起当前拥塞的业务。
在上述方案中， 所述主小区， 还用于在解除当前拥塞后， 根据自身的 空口资源和信道质量信息、 以及获取的各协作小区的信道质量信息和剩余 空口资源， 重新调整自身以及各协作小区的资源调度。
本发明提供的基于 CoMP的拥塞控制方法及系统， 主小区通过对自身 以及各协作小区的剩余空口资源进行整合， 调整自身及各协作小区的资源 调度， 为引起拥塞的业务分配调度所需的空口资源， 解除空口拥塞， 相比 现有的拥塞控制方法， 本发明既不需要抢拆 UE业务， 也不会降低 UE业务 的 QoS,不需要 UE的参与，拥塞控制流程简单，并且还实现了对基于 CoMP 的 LTE-A系统的空口拥塞控制， 能够有效提高系统的整体吞吐量。 附图说明
图 1为本发明基于 CoMP的拥塞控制方法的实现流程图；
图 为本发明实施例一中基于 CoMP的拥塞控制的实现流程图； 图 3为本发明实施例二中基于 CoMP的拥塞控制的实现流程图； 图 4为本发明实施例三对 LTE-A系统进行空口拥塞控制的实现流程图。 具体实施方式
本发明的基本思想是： 由主小区根据緩解拥塞所需要的空口资源、 自 身当前的信道质量和剩余空口资源、 以及各协作小区的信道质量和剩余空 口资源， 整合当前 CoMP小区集中各小区的资源， 调整 CoMP小区集各小 区的资源调度， 为引起拥塞的业务分配空口资源， 达到緩解空口拥塞， 成 功接纳当前业务承载的目的。 其中， 当前 CoMP小区集为包含有所述主小 区和各协作小区的小区集合。
本发明一种基于 CoMP的拥塞控制方法， 参照图 1所示， 主要可以包 括以下步驟：
步驟 101 : 主小区获取各协作小区的信道质量信息和剩余空口资源； 具体地， 所述各协作小区周期性地向所述主小区反馈自身的信道质量 信息和剩余空口资源。
步驟 102: 所述主小区根据解除当前拥塞所需要的空口资源、 以及自身 和各协作小区的信道质量信息和剩余空口资源， 整合自身以及所述各协作 小区的空口资源， 并调整自身以及各协作小区的资源调度。
其中， 空口资源具体是指空口资源块（RB, Resource Block ), 剩余空 口资源即剩余 RB数目，解除当前拥塞所需要的空口资源即解除当前拥塞所 需要的 RB数目。 其中， 信道质量信息可以包括上行信道质量指示（CQI, channel quality index )、信号与干扰力口噪声比（ SINR, Signal to Interference plus Noise Ratio ) 等参数。
其中， 在当前拥塞发生在所述主小区建立业务时， 所述主小区记录解 除当前拥塞所需要的空口资源； 在当前拥塞发生在一个协作小区建立业务 时， 所述协作小区向所述主小区发送拥塞控制请求， 所述拥塞控制请求包 含有解除当前拥塞所需要的空口资源。
具体地， 所述主小区统计自身以及各协作小区的剩余空口资源， 并验 证统计得到的所有剩余空口资源是否不小于解除当前拥塞所需要的空口资 源， 在验证统计得到的所有剩余空口资源不小于解除当前拥塞所需要的空 口资源时， 调用自身和 /或所述各协作小区的剩余空口资源调度引起当前拥 塞的业务； 在验证统计得到的所有剩余空口资源小于解除当前拥塞所需要 的空口资源时， 则结束当前的拥塞控制， 拥塞控制失败。
其中， 在当前拥塞发生在一个协作小区建立业务时， 所述主小区调用 自身的剩余空口资源、 以及除发生拥塞的协作小区之外的其他各协作小区 的剩余空口资源调度引起当前拥塞的业务。 在当前拥塞发生在所述主小区 建立业务时， 所述主小区调用所述各协作小区的剩余空口资源调度引起当 前拥塞的业务。如此，能够在保证当前 CoMP小区集中各小区 QoS的同时， 集中调度当前 CoMP小区集中除发生空口拥塞的小区之外其他小区的空口 资源， 从而能够合理有效的利用剩余空口资源。
实际应用中， 所述主小区从统计得到的所有剩余空口资源中分配出用 于解除当前拥塞的空口资源， 得到剩余空口资源的调用结果， 并将所述剩 余空口资源的调用结果通知给所述各协作小区； 根据所述剩余空口资源的 调用结果， 所述主小区和 /或各协作小区调用自身的剩余空口资源调度所述 引起当前拥塞的业务。 当前拥塞发生在所述主小区建立业务时， 所述主小区从所有协作小区 的剩余空口资源中分配用于解除当前拥塞的空口资源， 得到剩余空口资源 的调用结果， 并将所述剩余空口资源的调用结果通知给所述各协作小区； 根据所述剩余空口资源的调用结果， 所述各协作小区调用自身的剩余空口 资源进行所述主小区业务的调度。
当前拥塞发生在一个协作小区建立业务时， 所述主小区从自身的剩余 空口资源、 以及除发生拥塞的协作小区之外的其他各协作小区的剩余空口 资源中， 分配出用于解除当前拥塞的空口资源， 得到剩余空口资源的调用 结果， 并将所述剩余空口资源的调用结果通知给所述各协作小区； 根据所 述剩余空口资源的调用结果， 所述主小区和 /或除发生拥塞的协作小区之外 的其他各协作小区调用自身的剩余空口资源调度所述发生拥塞的协作小区 业务。
这里， 所述调用结果包含所述主小区和 /或各协作小区用于调度引起当 前拥塞业务的空口资源。 实际应用中， 所述调用结果具体可以为下行控制 信息 （DCI, Downlink Control Information ), DCI主要可以包括当前 CoMP 小区集中各小区用于调度引起当前拥塞业务的空口 RB、 调制编码方案 ( MCS, Modulation and Coding Scheme )等。
这里，所述主小区可以通过 X2口消息将所述剩余空口资源的调用结果 通知给所述各协作小区。
在解除当前拥塞后， 所述主小区还可以根据自身的空口资源和信道质 量信息、 以及获取的各协作小区的信道质量信息和剩余空口资源， 重新调 整自身以及各协作小区的资源调度。
具体地， 所述主小区根据自身的空口资源和信道质量信息、 以及获取 的各协作小区的信道质量信息和剩余空口资源 , 整合自身及各协作小区的 空口资源， 并调整自身以及各协作小区的资源调度， 将调整得到的调用结 果通知给所述各协作小区。 这里的调用结果包含所述主小区、 以及各协作 小区用于当前各业务调度的空口资源。 如此， 能够及时有效的緩解空口拥 塞解除后可能出现的空口资源分配不均衡。
相应的， 本发明还提供了一种基于 CoMP的拥塞控制系统， 所述系统 主要可以包括： 主小区和各协作小区， 其中， 所述主小区用于根据解除当 前拥塞所需要的空口资源、 以及自身和所述各协作小区的信道质量信息和 剩余空口资源， 整合自身以及所述各协作小区的空口资源， 并调整自身以 及所述各协作小区的资源调度。
具体地， 所述主小区包括获取单元， 用于获取所述各协作小区的信道 质量信息和剩余空口资源。
其中， 所述各协作小区包括反馈单元， 用于周期性地向所述主小区反 馈自身的信道质量信息和剩余空口资源； 所述主小区的获取单元还用于接 收所述各协作小区反馈的信道质量信息和剩余空口资源。
具体地， 所述主小区还包括： 整合单元和调整单元， 其中， 整合单元， 用于统计主小区以及各协作小区的剩余空口资源， 验证统计得到的所有剩 余空口资源是否不小于解除当前拥塞所需要的空口资源， 并将验证的结果 通知给所述调整单元； 调整单元， 用于在所述整合单元验证的结果为统计 得到的所有剩余空口资源不小于解除当前拥塞所需要的空口资源时， 调用 所述剩余空口资源调度引起当前拥塞的业务。
其中， 整合单元具体用于统计所述主小区当前的剩余空口资源和所述 获取单元获取的各协作小区的剩余空口资源， 得到当前可用的所有剩余空 口资源。
所述调整单元还用于在所述整合单元验证的结果为统计得到的所有剩 余空口资源小于解除当前拥塞所需要的空口资源时， 结束当前的拥塞控制 流程。 其中， 所述各协作小区的反馈单元， 还可以用于在当前拥塞发生自身 建立业务时， 向所述主小区发送拥塞控制请求， 所述拥塞控制请求包含有 解除当前拥塞所需要的空口资源； 所述主小区的获取单元， 还可以用于接 收所述各协作小区发送的拥塞控制请求； 和 /或， 所述主小区还包括记录单 元， 用于在当前拥塞发生在自身建立业务时， 记录解除当前拥塞所需要的 空口资源。
其中， 所述主小区还用于在解除当前拥塞后， 根据自身的空口资源和 信道质量信息、 以及获取的各协作小区的信道质量信息和剩余空口资源 , 重新调整自身以及各协作小区的资源调度。
实施例一
当前 CoMP小区集中主小区发生空口拥塞时， 进行空口拥塞控制的具 体实现流程如图 2所示， 步驟如下：
步驟 201 : 当前 CoMP小区集中各协作小区根据预设置的时间周期，周 期性地向主小区反馈自身的信道质量信息和剩余空口资源。
具体地， 各协作小区向主小区反馈包含有自身的 CQI、 SINR等的信道 质量信息、 以及剩余 RB数目。
步驟 202: 主小区接收核心网发送的 E-UTRAN无线接入承载建立请求 ( E-RAB SETUP REQUEST , E-UTRAN Radio Access Bearer SETUP REQUEST ) 消息， 触发主小区接纳 UE的一个业务， 之后， 接纳 UE的一 个业务时发生空口拥塞， 主小区记录下解除该空口拥塞所需要的空口资源， 并根据自身当前的信道质量信息和剩余空口资源、 以及各协作小区上一次 反馈的信道质量信息和剩余空口资源， 整合当前 CoMP小区集的剩余空口 资源， 并调整自身以及各协作小区的资源调度， 成功解除拥塞。
具体地，主小区记录下解除所述空口拥塞所需要的空口 RB数目，整合 自身及各协作小区的剩余空口资源，得到当前可用的所有剩余 RB数目，并 验证得到当前可用的所有剩余 RB 数目不小于解除所述空口拥塞所需要的 空口 RB数目， 此时， 从各协作小区的剩余 RB中分配用于进行引起拥塞业 务的调度的 RB, 得到剩余 RB的调用结果， 并通知给各协作小区， 各协作 小区采用所述调用结果，分别调用自身的剩余 RB进行所述业务的调用。如 此， 主小区发生空口拥塞时， 减少主小区自身的资源调度或停止主小区自 身的资源调度， 集中调用各协作小区的剩余资源， 以达到解除空口拥塞、 成功接纳承载的目的。
步驟 203 : 拥塞成功解除后， 主小区向所述 UE 发送 RRC 重配 ( RRCConnectionReconfiguration ) 消息， 触发所述业务的建立流程。
步驟 204: 业务建立成功后， 主小区向核心网返回 E-RAB 建立响应 ( E-RAB SETUP RESPONSE )消息，通知核心网所述业务的承载建立成功； 步驟 205:主小区根据自身及各协作小区的信道质量信息和剩余空口资 源， 重新调整 CoMP小区集中各小区的资源调度。
具体的 , 主小区根据自身及各协作小区的信道质量信息和剩余空口资 源， 整合自身以及各协作小区的空口资源， 并调整自身以及各协作小区进 行所述 UE当前各业务调度的空口资源分配。
实施例二
当前 CoMP小区集中任意一个协作小区发生空口拥塞时， 进行空口拥 塞控制的具体实现流程如图 3所示， 步驟如下：
步驟 301： 与步驟 201完全相同；
步驟 302:当前 CoMP小区集中一个协作小区接收到核心网发送的承载 建立请求消息后，接纳 UE的一个业务时发生空口拥塞，所述协作小区向主 小区发送拥塞控制请求， 所述拥塞控制请求包含有解除当前拥塞需要的空 口资源、 以及所述协作小区的信道质量信息和剩余空口资源。
步驟 303: 主小区接收到所述协作小区发送的拥塞控制请求后，根据上 一次接收到的各协作小区的信道质量信息和剩余空口资源、 以及自身的信 道质量信息和剩余空口资源， 整合当前 CoMP小区集的剩余空口资源， 调 整自身以及各协作小区的资源调度， 并在成功解除拥塞后通知所述协作小 区；
具体地， 主小区从所述拥塞控制请求中得到解除所述空口拥塞所需要 的空口 RB数目，整合自身及各协作小区的剩余空口资源，得到当前可用的 所有剩余 RB数目，并险证得到当前可用的所有剩余 RB数目不小于解除所 述空口拥塞所需要的空口 RB数目，此时，从自身的剩余 RB、以及当前 CoMP 小区集中除所述发生拥塞的协作小区之外的其他各协作小区的剩余 RB中， 分配用于进行引起拥塞业务的调度的 RB, 得到剩余 RB的调用结果， 并通 知给当前 CoMP小区集中除所述发生拥塞的协作小区之外的其他各协作小 区， 所述主小区以及当前 CoMP小区集中除所述发生拥塞的协作小区之外 的其他各协作小区采用所述调用结果，分别调用自身的剩余 RB进行所述业 务的调用。 如此， 针对发生拥塞的协作小区不进行资源调度或者减少资源 调度， 以达到緩解空口资源拥塞、 成功接纳承载的目的。
步驟 304: 拥塞成功解除后， 发生拥塞的协作小区向所述 UE发送 RRCConnectionReconfiguration消息， 触发所述业务的建立流程。
步驟 305: 所述业务建立成功后，协作小区向核心网回复承载建立响应 消息， 通知核心网 载建立成功；
步驟 306: 与步驟 205完全相同。
实施例三
如图 4所示， 对 LTE-A系统进行空口拥塞控制的流程主要可以包括以 下步驟：
步驟 401 : 小区接收移动性管理设备（MME, Mobility Management Entity )发送的 E-UTRAN无线接入承载（E-RAB, E-UTRAN Radio Access Bearer )建立请求；
步驟 402： 小区建立所述 E-RAB时， 发生空口拥塞；
步驟 403: 验证所述小区是否为 CoMP小区， 如果是， 继续步驟 404, 否则， 直接进行步驟 405;
步驟 404:对所述小区进行基于 CoMP的拥塞控制处理，如果成功解除 所述拥塞， 接纳 E-RAB成功， 则继续步驟 406; 如果未成功解除所述拥塞， 继续步驟 405;
具体地， 如果所述小区为主小区， 可以采用实施例一的处理过程来实 现， 如果所述小区为协作小区， 可以采用实施例二的处理过程来实现。
步驟 405: 对所述小区进行现有 LTE系统的拥塞控制处理， 如果成功 解除所述拥塞， 接纳 E-RAB成功， 则继续步驟 406; 如果未成功解除所述 拥塞， 接纳 E-RAB失败， 则结束当前流程；
这里，现有 LTE系统拥塞控制处理的具体实现过程为本领域常用技术， 步驟 406: 所述小区向 MME返回 E-RAB建立成功的响应消息， 结束 当前流程。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种基于多点协作 （CoMP ) 的拥塞控制方法， 其特征在于， 所述 方法包括：
主小区根据解除当前拥塞所需要的空口资源、 以及自身和各协作小区 的信道质量信息和剩余空口资源， 整合自身以及所述各协作小区的空口资 源， 并调整自身以及各协作小区的资源调度。
2、 根据权利要求 1所述基于 CoMP的拥塞控制方法， 其特征在于， 在 所述主小区整合自身以及所述各协作小区的空口资源之前， 所述方法还包 括： 所述主小区获取各协作小区的信道质量信息和剩余空口资源。
3、 根据权利要求 2所述基于 CoMP的拥塞控制方法， 其特征在于， 所 述主小区获取各协作小区的信道质量信息和剩余空口资源， 为： 所述各协 作小区周期性地向所述主小区反馈自身的信道质量信息和剩余空口资源。
4、 根据权利要求 1所述基于 CoMP的拥塞控制方法， 其特征在于， 所 述方法还包括： 当前拥塞发生在所述主小区建立业务时， 所述主小区记录 解除当前拥塞所需要的空口资源。
5、 根据权利要求 1所述基于 CoMP的拥塞控制方法， 其特征在于， 所 述方法还包括： 当前拥塞发生在一个协作小区建立业务时， 协作小区向所 述主小区发送拥塞控制请求， 所述拥塞控制请求包含有解除当前拥塞所需 要的空口资源。
6、 根据权利要求 1所述基于 CoMP的拥塞控制方法， 其特征在于， 所述主小区整合自身以及所述各协作小区的空口资源， 包括： 所述主 小区统计自身以及各协作小区的剩余空口资源， 并验证统计得到的所有剩 余空口资源是否不小于解除当前拥塞所需要的空口资源；
所述主小区调整自身以及各协作小区的资源调度分配， 包括： 在所述 主小区验证统计得到的所有剩余空口资源不小于解除当前拥塞所需要的空 口资源时， 调用自身和 /或所述各协作小区的剩余空口资源调度引起当前拥 塞的业务。
7、 根据权利要求 6所述基于 CoMP的拥塞控制方法， 其特征在于， 所 述调用自身和 /或所述各协作小区的剩余空口资源调度引起当前拥塞的业 务， 为： 当前拥塞发生在所述主小区建立业务时， 所述主小区调用所述各 协作小区的剩余空口资源调度引起当前拥塞的业务。
8、 根据权利要求 6所述基于 CoMP的拥塞控制方法， 其特征在于， 所 述调用自身和 /或所述各协作小区的剩余空口资源调度引起当前拥塞的业 务， 为： 在当前拥塞发生在一个协作小区建立业务时， 所述主小区调用自 身的剩余空口资源、 以及除发生拥塞的协作 d、区之外的其他各协作小区的 剩余空口资源调度引起当前拥塞的业务。
9、 根据权利要求 1至 8任一项所述基于 CoMP的拥塞控制方法， 其特 征在于， 所述方法还包括： 在解除当前拥塞后， 所述主小区根据自身的空 口资源和信道质量信息、 以及获取的各协作小区的信道质量信息和剩余空 口资源， 重新调整自身以及各协作小区的资源调度。
10、 根据权利要求 9所述基于 CoMP的拥塞控制方法， 其特征在于， 所述主小区根据自身的空口资源和信道质量信息、 以及获取的各协作小区 的信道质量信息和剩余空口资源， 重新调整自身以及各协作小区的资源调 度分配， 包括： 所述主小区根据自身的空口资源和信道质量信息、 以及获 取的各协作小区的信道质量信息和剩余空口资源， 整合自身及各协作小区 的空口资源， 并调整自身以及各协作小区的资源调度， 将调整得到的调用 结果通知给所述各协作小区。
11、 一种基于 CoMP的拥塞控制系统， 其特征在于， 所述系统包括： 主小区和各协作小区， 其中， 所述主小区用于根据解除当前拥塞所需要的 空口资源、 以及自身和所述各协作小区的信道质量信息和剩余空口资源， 整合自身以及所述各协作小区的空口资源， 并调整自身以及所述各协作小 区的资源调度。
12、 根据权利要求 11所述基于 CoMP的拥塞控制系统， 其特征在于， 所述主小区包括获取单元， 用于获取所述各协作小区的信道质量信息和剩 余空口资源。
13、 根据权利要求 12所述基于 CoMP的拥塞控制系统， 其特征在于， 所述各协作小区包括反馈单元， 用于周期性地向所述主小区反馈自身的信 道质量信息和剩余空口资源； 所述主小区的获取单元还用于接收所述各协 作小区反馈的信道质量信息和剩余空口资源。
14、 根据权利要求 13所述基于 CoMP的拥塞控制系统， 其特征在于， 所述各协作小区的反馈单元， 还用于在当前拥塞发生自身建立业务时， 向所述主 ' j、区发送拥塞控制请求， 所述拥塞控制请求包含有解除当前拥塞 所需要的空口资源；
所述主小区的获取单元， 还用于接收所述各协作小区发送的拥塞控制 请求；
和 /或， 所述主小区还包括记录单元， 用于在当前拥塞发生在自身建立 业务时， 记录解除当前拥塞所需要的空口资源。
15、 根据权利要求 11至 14任一项所述基于 CoMP的拥塞控制系统， 其特征在于， 所述主小区包括： 整合单元和调整单元， 其中，
整合单元， 用于统计主小区以及各协作小区的剩余空口资源， 验证统 计得到的所有剩余空口资源是否不小于解除当前拥塞所需要的空口资源， 并将验证的结果通知给所述调整单元；
调整单元， 用于在所述整合单元验证的结果为统计得到的所有剩余空 口资源不小于解除当前拥塞所需要的空口资源时， 调用所述剩余空口资源 调度引起当前拥塞的业务。
16、 根据权利要求 11至 14任一项所述基于 CoMP的拥塞控制系统， 其特征在于， 所述主小区， 还用于在解除当前拥塞后， 根据自身的空口资 源和信道质量信息、 以及获取的各协作小区的信道质量信息和剩余空口资 源， 重新调整自身以及各协作小区的资源调度。
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