WO2010105533A1 - 一种发送多媒体广播和组播业务的权衡决策方法及系统 - Google Patents

一种发送多媒体广播和组播业务的权衡决策方法及系统 Download PDF

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WO2010105533A1
WO2010105533A1 PCT/CN2010/070993 CN2010070993W WO2010105533A1 WO 2010105533 A1 WO2010105533 A1 WO 2010105533A1 CN 2010070993 W CN2010070993 W CN 2010070993W WO 2010105533 A1 WO2010105533 A1 WO 2010105533A1
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threshold
mbms service
comparison result
network side
mbms
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PCT/CN2010/070993
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French (fr)
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毛磊
马子江
艾建勋
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中兴通讯股份有限公司
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Publication of WO2010105533A1 publication Critical patent/WO2010105533A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

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  • the present invention relates to the field of wireless communications, and in particular, to a trade-off decision method and system for transmitting a multimedia broadcast multicast service (MBMS) in a single cell range in a Long Term Evolution (LTE) system.
  • MBMS multimedia broadcast multicast service
  • LTE Long Term Evolution
  • 3GPP launched the LTE Research Working Group to research and design the 3.9G, the improved 3G next-generation network for the evolution of the third generation mobile communication technology.
  • 3GPP proposes MBMS, which is a technology for transmitting data from one data source to multiple targets, and realizes sharing of network resources including a core network and an access network. Increased utilization of network resources, especially air interface resources.
  • the MBMS service transmission in the LTE system may be a single cell transmission or a multi-cell transmission.
  • the choice of transmission mode is determined by the size of the service area.
  • MCE Multi-cell/Multicast Coordination Entity
  • RBs Resource Blocks
  • eNB evolved node
  • Evolved Node B is responsible for the configuration of the RB.
  • the single cell sending MBMS service is different from the multi-cell synchronous transmission mode.
  • the terminal UE cannot receive the signals sent by multiple cells at the same time, and cannot obtain the multi-cell combining gain.
  • the existing technology is adopted. It is usually necessary to increase the transmission power, but increasing the transmission power necessarily increases the interference to neighboring cells. If only the MBMS service is sent to the user in the central area of the cell, it is not necessary to require the signal to cover the entire cell, that is, it is not necessary to increase the transmission power, and a smaller transmission power can be used, which can greatly reduce the Interference caused by neighboring cells.
  • the users involved in this article refer to: Users who use UE, for convenience of description, this article is called user.
  • the control signaling carried by the MBMS control channel (MCCH, MBMS control channel) is repeated multiple times, and the modulation and coding modes are lower, control signaling. If the entire cell can be reliably covered, the user at the edge of the cell can obtain the content of the MCCH, and know the MBMS service currently being sent in the cell according to the content of the MCCH.
  • a smaller transmit power is used in transmitting the MBMS service data, which is mainly to ensure that the MBMS service is sent to the user in the central area of the cell, and the user at the cell edge cannot be guaranteed to be correct.
  • Received the MBMS service even if the user at the cell edge knows that the MBMS service is currently being sent in the cell according to the content of the MCCH, the user at the cell edge cannot ensure that the MBMS service is correctly and reliably received. Therefore, the MBMS service is sent in a single cell range. When using a small transmission power, the user experience of these cell edge users is not good.
  • the main purpose of the present invention is to provide a method and system for determining a trade-off of an MBMS, which can solve the two problems in the prior art.
  • the transmit power/pair The interference caused by the neighboring cell is well balanced with the user experience of the UE/the processing load of the network side base station, which not only avoids interference of the transmitting power to the neighboring cell; but also improves the decision processing based on the tradeoff.
  • the user experience can reduce the processing load of the network side base station while supporting user feedback.
  • a trade-off decision method for transmitting multimedia broadcast and multicast services comprising: configuring a threshold value on a network side and transmitting;
  • the UE performs a decision process corresponding to the comparison result according to the comparison result.
  • the threshold value corresponds to a multimedia broadcast and multicast service (MBMS) sent by the network side; and the decision process is a decision process related to receiving an MBMS service.
  • MBMS multimedia broadcast and multicast service
  • the network side configuration threshold value is specifically: the network side configures respective corresponding threshold values for at least one MBMS service;
  • the configuration is as follows: The network side configures a different threshold for each MBMS service; or the network side configures the same threshold for at least one MBMS service; The threshold value is encapsulated into the MBMS configuration information, and the network side sends the MBMS configuration information to the UE by using high layer signaling.
  • performing a decision process related to receiving the MBMS service is specifically:
  • the user When the comparison result is less than the threshold, the user is prompted not to be in the coverage of the MBMS service, and the user determines whether to receive the MBMS service; or, the user can learn that the UE is caused by the UE itself. The result of a decrease in reception performance of the MBMS service.
  • the method further includes: when the MBMS service supports the UE to feed back to the network side, distinguishing, according to the comparison result, a UE that can implement feedback.
  • the current UE when the comparison result is less than or equal to the threshold, the current UE does not perform the target Upstream feedback on current MBMS services.
  • the specific type of the threshold includes: a signal strength, a signal quality, or a signal to noise ratio; correspondingly, the current measurement result includes: a measurement result obtained when measuring a measurement object for different specific types of threshold values.
  • a trade-off decision system for transmitting a multimedia broadcast and multicast service MBMS comprising: a configuration unit, a comparison unit and a decision processing unit;
  • a configuration unit configured to send the threshold after the network side configures the threshold
  • a comparing unit configured to receive, by the UE, the threshold value, and compare the current measurement result obtained by performing the measurement with the threshold value
  • a decision processing unit configured to perform, by the UE, a decision process corresponding to the comparison result according to the comparison result.
  • the decision processing unit is further configured to: when the comparison result is greater than or equal to the threshold, the UE performs the receiving of the MBMS service; when the comparison result is less than the threshold, prompting the user Currently, the user is not in the coverage of the MBMS service, and the user determines whether to receive the MBMS service, or enables the user to learn that the receiving performance of the MBMS service is degraded due to the UE itself.
  • the system further includes: a distinguishing unit, configured to distinguish, according to the comparison result, a UE that can perform feedback, when the comparison result is less than or equal to the threshold, the current UE does not perform uplink for the current MBMS service. Feedback.
  • a distinguishing unit configured to distinguish, according to the comparison result, a UE that can perform feedback, when the comparison result is less than or equal to the threshold, the current UE does not perform uplink for the current MBMS service. Feedback.
  • the network side of the present invention configures a threshold value and sends the threshold value, and the UE receives the threshold value, and compares the current measurement result obtained by performing the measurement with the threshold value; the UE performs a decision process corresponding to the comparison result according to the comparison result.
  • the threshold value of the configuration is as follows: The threshold value is encapsulated in the MBMS configuration information, and the UE is notified by the network side; the threshold value is used as a reference value, and compared with the current measurement result of the UE; the UE makes a decision according to the comparison result to determine whether the UE is Can correctly receive the MBMS service and prompt The user, in order to determine whether the user needs to continue to receive the MBMS service, thereby improving the user experience.
  • the network side can configure a smaller transmit power to reduce interference to neighboring cells.
  • the prior art does not involve the configuration of the threshold, and there is no threshold in the MBMS configuration information, but simply reduces the transmission power to reduce interference to neighboring cells.
  • FIG. 1 is a schematic diagram of an implementation process of a method according to the present invention.
  • FIG. 2 is a schematic diagram of transmission of a single cell central area in the present invention. detailed description
  • the basic idea of the present invention is: the network side configures a threshold value; the UE receives the threshold value, compares the current measurement result obtained by performing the measurement with a threshold value; and the UE performs a decision corresponding to the comparison result according to the comparison result. deal with.
  • a method for transmitting an MBMS includes the following steps: Step 101: A network threshold is configured, and the threshold is sent to a UE.
  • the threshold configured on the network side is a threshold corresponding to the MBMS service.
  • the network side configuration threshold is specifically: the network side configures respective corresponding thresholds for at least one MBMS service, and the adopted configuration manner is: the network side configures each of the MBMS services with a different threshold. Or, the network side uniformly configures the same threshold for at least one MBMS service, that is, multiple MBMS services use the same threshold.
  • the network side includes an eNB, a base station Node B, a radio network controller (RNC), or a base transceiver station (BTS, Base Transceiver Station).
  • the sending of the threshold is specifically: encapsulating the threshold into the MBMS configuration information, and the network side sends the MBMS configuration information to the UE through the high layer signaling.
  • the high layer signaling includes: system broadcast message, MCCH or dedicated signaling.
  • Step 102 The UE receives the threshold, and the UE compares the current measurement result obtained by performing the measurement with the threshold.
  • Step 103 The UE performs a decision process corresponding to the comparison result according to the comparison result.
  • the decision processing here is a decision process for receiving the MBMS service.
  • the decision processing for performing the receiving MBMS service corresponding to the comparison result includes two cases.
  • the first case is: when the comparison result is greater than or equal to the threshold, the UE performs the MBMS service reception.
  • the second case is: when the comparison result is less than the threshold, the user is prompted not to be in the coverage of the MBMS service, and the user decides whether to receive the MBMS service; or, the user can know that it is due to the UE.
  • the reception performance of the MBMS service is degraded due to its own cause.
  • the comparison result is the strength of the pilot signal and the specific type of the threshold is the signal strength
  • the specific type of the threshold is the signal strength
  • the UE measures the pilot signal and compares it with the previously determined threshold, that is, the signal strength, if the strength of the pilot signal is low.
  • the user is prompted to leave the coverage of the MBMS service, and the UE is still prompted to perform MBMS. Reception of business.
  • the method further includes: when the MBMS service supports the UE to feed back to the network side, the UE that can implement feedback is distinguished according to the comparison result.
  • the specific processing procedure of the distinguishing is: When the comparison result is less than or equal to the threshold value, the current UE that has the measurement report or the error block retransmission request needs feedback does not perform the uplink feedback. For example, if the strength of the pilot signal is less than or equal to the previously determined threshold, the UE does not perform uplink feedback when there is a measurement report, such as: reporting channel quality indication (CQI) feedback, response confirmation (ACK) feedback or response rejection (NCK) feedback, etc.
  • CQI channel quality indication
  • ACK response confirmation
  • NCK response rejection
  • the specific types of threshold values mentioned above include: signal strength, signal quality or signal to noise ratio.
  • the current measurement results involved in step 102 include: the measurement results obtained when measuring the measurement object for different specific types of threshold values.
  • the UE receives the MBMS configuration information, and after parsing the threshold, the related signal may be measured to obtain the measurement result; or, the measurement result of the existing related signal is directly used.
  • the related signal is a measurement object for different specific types of threshold values.
  • the measurement object includes: a pilot signal of the local cell, a dedicated pilot signal, or other measurement object specified by the network side.
  • the method may further include: a step of determining a threshold value by the network side, specifically, the determined threshold value may be: an admission threshold required by the UE to correctly receive the MBMS service, with a threshold
  • the specific type of value is the signal strength.
  • the admission threshold refers to the minimum signal strength required by the UE to correctly receive the MBMS service.
  • the threshold value may also be determined according to the transmission power of the MBMS service, for example, according to the transmission power of the MBMS service and the expected coverage distance, the path loss at the base station to the desired coverage edge is subtracted from the transmission power, and a signal strength at the coverage edge is obtained. , the signal strength is taken as the threshold value, that is, the admission threshold.
  • FIG. 2 includes a base station 21, a UE11, and a UE12.
  • the circular area is a cell center area
  • the hexagonal area is a cell edge area.
  • the small transmit power ensures that the UE 11 in the cell center area can receive the MBMS service, and the UE 12 does not need to guarantee the reception performance of the UE12 to the MBMS service in the cell edge area, and is independently selected by the UE 12.
  • a trade-off decision system for transmitting multimedia broadcast and multicast services comprising: a configuration unit, a comparison unit, and a decision processing unit.
  • the configuration unit is configured to send a threshold value after the threshold value is configured on the network side. And comparing, after the UE receives the threshold, comparing the current measurement result obtained by performing the measurement with a threshold.
  • the decision processing unit is configured to perform, by the UE, a decision process corresponding to the comparison result according to the comparison result.
  • the decision processing unit is further configured to: when the comparison result is greater than or equal to the threshold, the UE performs the MBMS service reception; when the comparison result is less than the threshold, the user is prompted not to be in the coverage of the MBMS service, The user decides whether to receive the MBMS service, or enables the user to know that the reception performance of the MBMS service is degraded due to the UE itself.
  • the system further includes: a distinguishing unit, configured to distinguish, according to the comparison result, a UE that can implement feedback, when the comparison result is less than or equal to the threshold, the current UE does not perform uplink feedback for the current MBMS service.
  • a distinguishing unit configured to distinguish, according to the comparison result, a UE that can implement feedback, when the comparison result is less than or equal to the threshold, the current UE does not perform uplink feedback for the current MBMS service.

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Description

一种发送多媒体广播和组播业务的权衡决策方法及系统 技术领域
本发明涉及无线通信领域， 尤其涉及一种长期演进（LTE, Long Term Evolution ) 系统中在单小区范围内发送多媒体广播和组播业务（ MBMS , Multimedia Broadcast Multicast Service ) 时的权衡决策方法及系统。 背景技术
2005年， 3GPP启动了 LTE研究的工作组， 研究和设计第三代移动通 信技术演进的 3.9G即改进的 3G的下一代网络。 为了有效地利用移动网络 资源， 3GPP提出了 MBMS , MBMS这种业务是一种从一个数据源向多个 目标传送数据的技术， 实现了包括核心网和接入网在内的网络资源的共享， 提高了网络资源， 尤其是空中接口资源的利用率。
LTE系统中的 MBMS业务传输可以是单小区传输，也可以是多小区传 输。 传输模式的选择根据业务区域大小决定。 对于多小区模式（MBSF , Multicast/Broadcast over Single Frequency Network ) ,由多播协调实体 ( MCE, Multi-cell/multicast Coordination Entity ) 负责资源块（RB, Resource Block ) 的配置； 对于单小区模式， 由演进节点 （eNB , Evolved Node B ) 负责 RB 的配置。
单小区发送 MBMS业务不同于多小区的同步发送方式， 终端（UE )不 能同时接收到多个小区发送过来的信号， 无法获得多小区合并增益； 为了 保证小区边缘用户的接收质量， 采用现有技术， 通常需要增大发射功率， 但增大发射功率必然会增加对邻小区的干扰。 如果仅仅只为小区中心区域 的用户发送 MBMS业务， 那么是没有必要要求信号覆盖整个小区的， 也就 是说无需增大发射功率， 可以采用较小的发射功率， 这样可以大大降低对 邻小区造成的干扰。 这里需要指出的是， 本文涉及的用户是指： 使用 UE 的用户， 为了方便描述， 本文筒称为用户。
在上述单小区发送 MBMS业务的场景下， 由于控制信令， 比如 MBMS 控制信道 ( MCCH, MBMS control channel )所承载的控制信令采用多次重 复发送， 调制和编码方式等级较低， 控制信令是可以可靠地覆盖整个小区 的， 那么处于小区边缘的用户是可以获得 MCCH 的内容， 并根据 MCCH 的内容知道小区中当前正在发送的 MBMS业务。
然而， 由于此时， 为了避免对邻小区的干扰， 在传输 MBMS业务数据 时采用了较小的发射功率， 主要是保证向小区中心区域的用户发送 MBMS 业务， 无法保证小区边缘的用户也能正确接收到该 MBMS业务。 那么， 即 使处于小区边缘的用户根据 MCCH的内容知道小区中当前正在发送 MBMS 业务， 但实际上小区边缘的用户是无法保证正确可靠地接收该 MBMS业务 的， 因此，在单小区范围内发送 MBMS业务时，单纯采用较小的发射功率， 一方面会造成这些小区边缘用户的用户体验感不好； 另一方面， 甚至在有 反馈机制的情况下， 小区边缘的用户会不断请求网络侧重传发送错误的数 据包， 造成网络侧为了保证小区边缘的用户的接收不断重传， 大大增加了 网络侧基站的处理负荷。 目前， 在单小区范围内发送 MBMS业务时， 针对 这两方面问题， 尚没有有效的解决方案。 发明内容
有鉴于此， 本发明的主要目的在于提供一种发送 MBMS的权衡决策方 法及系统， 能解决采用现有技术存在的两方面问题， 当在单小区范围内发 送 MBMS业务时，在发射功率 /对邻小区造成的干扰大小与 UE的用户体验 感 /网络侧基站的处理负荷之间做很好的权衡决策处理， 不仅避免了发射功 率过大对邻小区的干扰； 而且基于权衡决策处理， 能提高用户体验感， 在 支持用户反馈的情况下能降低网络侧基站的处理负荷。 为达到上述目的， 本发明的技术方案是这样实现的：
一种发送多媒体广播和组播业务的权衡决策方法， 该方法包括： 网络侧配置门限值并发送；
终端 （UE )接收到所述门限值， 将执行测量所获取的当前测量结果与 所述门限值进行比较；
所述 UE根据比较结果， 执行与所述比较结果相对应的决策处理。 其中， 所述门限值与所述网络侧发送的多媒体广播和组播业务 ( MBMS )相对应； 所述决策处理为有关接收 MBMS业务的决策处理。
其中， 所述网络侧配置门限值具体为： 所述网络侧为至少一个 MBMS 业务分别配置各自对应的门限值；
采用的配置方式为： 网络侧为每个 MBMS业务都各自配置一个不同的 门限值；或者，网络侧为至少一个 MBMS业务统一配置一个相同的门限值； 所述门限值的发送具体为： 将门限值封装到 MBMS配置信息中， 网络 侧通过高层信令将所述 MBMS配置信息发送给所述 UE。
其中， 根据所述比较结果， 执行有关接收所述 MBMS业务的决策处理 具体为：
当所述比较结果大于或等于所述门限值时， UE进行所述 MBMS业务 的接收；
当所述比较结果小于所述门限值时， 提示用户当前不处于所述 MBMS 业务的覆盖范围， 由用户决定是否对所述 MBMS业务进行接收； 或者， 使 用户能获知由于 UE自身原因所导致的对所述 MBMS业务的接收性能下降 的结果。
其中， 该方法还包括： 当所述 MBMS业务支持所述 UE向所述网络侧 反馈时， 根据所述比较结果区分出能实现反馈的 UE。
其中， 当所述比较结果小于或等于所述门限值时， 当前 UE不执行针对 当前 MBMS业务的上行反馈。
其中， 所述门限值的具体类型包括： 信号强度、 信号质量或信噪比； 相应地， 所述当前测量结果包括： 针对不同具体类型门限值的测量对象测 量时所获取的测量结果。
一种发送多媒体广播和组播业务 MBMS的权衡决策系统，该系统包括： 配置单元， 比较单元和决策处理单元； 其中，
配置单元， 用于网络侧配置门限值后发送所述门限值；
比较单元，用于 UE接收到所述门限值，将执行测量所获取的当前测量 结果与所述门限值进行比较；
决策处理单元，用于所述 UE根据比较结果，执行与所述比较结果相对 应的决策处理。
其中， 所述决策处理单元， 进一步用于当所述比较结果大于或等于所 述门限值时， UE进行所述 MBMS业务的接收； 当所述比较结果小于所述 门限值时， 提示用户当前不处于所述 MBMS业务的覆盖范围， 由用户决定 是否对所述 MBMS业务进行接收， 或者， 使用户能获知由于 UE自身原因 导致对所述 MBMS业务的接收性能下降。
其中， 该系统还包括： 区分单元， 用于根据所述比较结果区分出能执 行反馈的 UE, 当所述比较结果小于或等于所述门限值时， 当前 UE不执行 针对当前 MBMS业务的上行反馈。
本发明的网络侧配置门限值并发送； UE接收到门限值， 将执行测量所 获取的当前测量结果与门限值进行比较； UE根据比较结果， 执行与比较结 果相对应的决策处理。
本发明配置门限值， 可以将门限值封装在 MBMS配置信息中由网络侧 通知 UE; 将门限值作为参考值， 与 UE当前的测量结果进行比较； UE根 据比较结果进行决策， 以确定 UE是否能正确接收该 MBMS业务， 并提示 用户， 以便用户决策是否需要继续接收 MBMS业务， 从而可以提高用户体 验感。对于 MBMS业务，在有些场景下， 网络侧可以配置较小的发射功率， 以减少对相邻小区的干扰。 而现有技术不涉及门限值的配置， 在 MBMS配 置信息中没有门限值， 只是单纯通过降低发射功率， 以减少对相邻小区的 干扰。 不能在发射功率与用户体验感 /网络侧基站的处理负荷之间做权衡处 理。 可见， 采用本发明， 利用引入的门限值， 以及将门限值与 UE当前的测 量结果进行比较，通过综合二者的比较， 由 UE执行与比较结果相对应的决 策处理， 能在满足避免干扰且无需增大发射功率的前提下， 当在单小区范 围内发送 MBMS业务时，在发射功率 /对邻小区造成的干扰大小与用户体验 感 /网络侧基站的处理负荷之间做很好的权衡决策处理， 不仅避免了发射功 率过大对邻小区的干扰； 而且基于权衡决策处理， 能提高用户体验感， 在 支持用户反馈的情况下能降低网络侧基站的处理负荷。 附图说明
图 1为本发明方法的实现流程示意图；
图 2为本发明中单小区中心区域发送示意图。 具体实施方式
本发明的基本思想是： 网络侧配置门限值； UE接收到门限值， 将执行 测量所获取的当前测量结果与门限值进行比较； UE根据比较结果， 执行与 比较结果相对应的决策处理。
下面结合附图对技术方案的实施作进一步的详细描述。
如图 1所示， 一种发送 MBMS的方法， 该方法包括以下步骤： 步骤 101、 网络侧配置门限值， 并发送该门限值给 UE。
这里， 在发送 MBMS 业务时， 网络侧配置的该门限值是与该 MBMS 业务相对应的门限值。 这里， 网络侧配置门限值具体为： 网络侧为至少一个 MBMS业务分别 配置各自相对应的门限值， 采用的配置方式为： 网络侧为每个 MBMS业务 都各自配置一个不同的门限值； 或者， 网络侧为至少一个 MBMS业务统一 配置一个相同的门限值， 也就是说， 多个 MBMS业务使用一个相同的门限 值。 其中， 网络侧包括 eNB、 基站 Node B、 无线网络控制器（ RNC )或基 站收发台 ( BTS, Base Transceiver Station )。
这里， 门限值的发送具体为： 将门限值封装到 MBMS配置信息中， 网 络侧通过高层信令将 MBMS配置信息发送给所述 UE。 其中， 高层信令包 括： 系统广播消息、 MCCH或专用信令。
步骤 102、 UE接收到该门限值， UE将执行测量所获取的当前测量结 果与该门限值进行比较。
步骤 103、 UE根据比较结果， 执行与该比较结果相对应的决策处理。 这里的决策处理为有关接收该 MBMS业务的决策处理。
这里， 根据该比较结果， 执行与该比较结果相对应的有关接收 MBMS 业务的决策处理包括两种情况， 第一种情况为： 当比较结果大于或等于门 限值时， UE进行 MBMS业务的接收； 第二种情况为： 当比较结果小于所 述门限值时， 提示用户当前并不处于 MBMS业务的覆盖范围， 由用户决定 是否对 MBMS业务进行接收； 或者， 使用户能获知正是由于 UE自身原因 而导致对 MBMS业务的接收性能下降。
对第二种情况进行举例， 当比较结果为导频信号的强度， 门限值的具 体类型为信号强度时， 当 UE从小区中央移动到小区边缘时， 接收 MBMS 业务的质量变差， 如检测到连续一段时间误块率 （BLER, Block error rate ) 高于一定门限，此时 UE对导频信号进行测量，并与之前确定的门限值即信 号强度进行比较， 如果导频信号的强度低于信号强度， 则提示用户， 当前 已经走离了该 MBMS业务的覆盖范围， 提示 UE是否仍然进行对 MBMS 业务的接收。
需要指出的是， 该方法还包括： 当 MBMS业务支持 UE向网络侧反馈 时， 根据该比较结果区分出能实现反馈的 UE。 该区分的具体处理过程为： 当比较结果小于或等于门限值时， 有测量上报、 或错块重传请求需反馈的 当前 UE不执行上行反馈。举例来说，如果导频信号的强度小于或等于之前 确定的门限值， UE在有测量上报的时候， 该 UE不要进行上行反馈， 如： 上报信道质量指示 （CQI ) 的反馈、 应答确认（ACK ) 的反馈或应答拒绝 ( NCK ) 的反馈等。
这里， 以上所涉及的门限值的具体类型包括： 信号强度、 信号质量或 信噪比等。 相应地， 步骤 102 中涉及的当前测量结果包括： 针对不同具体 类型门限值的测量对象测量时所获取的测量结果。 其中， 针对测量而言， UE收到 MBMS配置信息， 解析出门限值后， 可以先对相关信号进行测量， 以便获取到测量结果； 或者， 直接利用已有的相关信号的测量结果。 这里， 所谓相关信号即为针对不同具体类型门限值的测量对象， 举例来说， 该测 量对象包括： 本小区的导频信号， 专用导频信号或网络侧指定的其它测量 对象等。
这里， 在执行步骤 101 之前还可以包括： 网络侧确定门限值的步骤， 具体来说， 确定的门限值可以为： UE要正确接收 MBMS业务时所需的准 入阀值， 以门限值的具体类型为信号强度为例， 此时该准入阀值指： UE要 正确接收 MBMS业务时所需的最小信号强度。 也可以根据 MBMS业务的 发射功率确定门限值，比如根据 MBMS业务的发射功率和期望的覆盖距离， 由发射功率减掉基站到期望覆盖边缘处的路径损耗， 得到在覆盖边缘处的 一个信号强度， 将该信号强度作为门限值， 即准入阀值。
如图 2所示， 图 2包括基站 21、 UE11和 UE12, 圆形区域为小区中心 区域， 六边形区域为小区边缘区域， 可见采用本发明方法后， 网络采用较 小的发射功率， 保证小区中心区域的 UE11能接收到 MBMS业务， 无需保 证小区边缘区域的 UE12对 MBMS业务的接收性能， 由 UE12自主选择。
一种发送多媒体广播和组播业务的权衡决策系统， 该系统包括： 配置 单元， 比较单元和决策处理单元。 其中， 配置单元， 用于网络侧配置门限 值后发送门限值。 比较单元， 用于 UE接收到门限值后， 将执行测量所获取 的当前测量结果与门限值进行比较。决策处理单元，用于 UE根据比较结果， 执行与比较结果相对应的决策处理。
这里， 决策处理单元， 进一步用于当比较结果大于或等于门限值时， UE进行 MBMS业务的接收； 当比较结果小于所述门限值时， 提示用户当 前不处于 MBMS业务的覆盖范围， 由用户决定是否对 MBMS业务进行接 收， 或者， 使用户能获知由于 UE自身原因导致对 MBMS业务的接收性能 下降。
这里， 该系统还包括： 区分单元， 用于根据比较结果区分出能实现反 馈的 UE, 当比较结果小于或等于所述门限值时， 当前 UE不执行针对当前 MBMS业务的上行反馈。
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、 一种发送多媒体广播和组播业务的权衡决策方法， 其特征在于， 该 方法包括：
网络侧配置门限值并发送；
终端 （UE )接收到所述门限值， 将执行测量所获取的当前测量结果与 所述门限值进行比较；
所述 UE根据比较结果， 执行与所述比较结果相对应的决策处理。
2、 根据权利要求 1所述的方法， 其特征在于， 所述门限值与所述网络 侧发送的多媒体广播和组播业务（MBMS )相对应； 所述决策处理为有关 接收 MBMS业务的决策处理。
3、 根据权利要求 2所述的方法， 其特征在于， 所述网络侧配置门限值 具体为： 所述网络侧为至少一个 MBMS业务分别配置各自对应的门限值； 采用的配置方式为： 网络侧为每个 MBMS业务都各自配置一个不同的 门限值；或者，网络侧为至少一个 MBMS业务统一配置一个相同的门限值； 所述门限值的发送具体为： 将门限值封装到 MBMS配置信息中， 网络 侧通过高层信令将所述 MBMS配置信息发送给所述 UE。
4、 根据权利要求 2所述的方法， 其特征在于， 根据所述比较结果， 执 行有关接收所述 MBMS业务的决策处理具体为：
当所述比较结果大于或等于所述门限值时， UE进行所述 MBMS业务 的接收；
当所述比较结果小于所述门限值时， 提示用户当前不处于所述 MBMS 业务的覆盖范围， 由用户决定是否对所述 MBMS业务进行接收； 或者， 使 用户能获知由于 UE自身原因所导致的对所述 MBMS业务的接收性能下降 的结果。
5、 根据权利要求 2所述的方法， 其特征在于， 该方法还包括： 当所述 MBMS业务支持所述 UE向所述网络侧反馈时， 根据所述比较结果区分出 能实现反馈的 UE。
6、 根据权利要求 5所述的方法， 其特征在于， 当所述比较结果小于或 等于所述门限值时， 当前 UE不执行针对当前 MBMS业务的上行反馈。
7、 根据权利要求 1至 6中任一项所述的方法， 其特征在于， 所述门限 值的具体类型包括： 信号强度、 信号质量或信噪比；
相应地， 所述当前测量结果包括： 针对不同具体类型门限值的测量对 象测量时所获取的测量结果。
8、 一种发送多媒体广播和组播业务 MBMS 的权衡决策系统， 其特征 在于， 该系统包括： 配置单元， 比较单元和决策处理单元； 其中，
配置单元， 用于网络侧配置门限值后发送所述门限值；
比较单元，用于 UE接收到所述门限值，将执行测量所获取的当前测量 结果与所述门限值进行比较；
决策处理单元，用于所述 UE根据比较结果，执行与所述比较结果相对 应的决策处理。
9、 根据权利要求 8所述的系统， 其特征在于， 所述决策处理单元， 进 一步用于当所述比较结果大于或等于所述门限值时， UE进行所述 MBMS 业务的接收； 当所述比较结果小于所述门限值时， 提示用户当前不处于所 述 MBMS业务的覆盖范围， 由用户决定是否对所述 MBMS业务进行接收， 或者， 使用户能获知由于 UE自身原因导致对所述 MBMS业务的接收性能 下降。
10、 根据权利要求 8或 9所述的系统， 其特征在于， 该系统还包括： 区分单元， 用于根据所述比较结果区分出能执行反馈的 UE, 当所述比较结 果小于或等于所述门限值时， 当前 UE不执行针对当前 MBMS业务的上行 反馈。
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