WO2011020276A1 - 一种用于长期演进系统的载波聚合方法及装置 - Google Patents

一种用于长期演进系统的载波聚合方法及装置 Download PDF

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Publication number
WO2011020276A1
WO2011020276A1 PCT/CN2009/076013 CN2009076013W WO2011020276A1 WO 2011020276 A1 WO2011020276 A1 WO 2011020276A1 CN 2009076013 W CN2009076013 W CN 2009076013W WO 2011020276 A1 WO2011020276 A1 WO 2011020276A1
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Prior art keywords
carrier
aggregation
primary
bandwidth
need
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English (en)
French (fr)
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魏巍
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ZTE Corp
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ZTE Corp
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Priority to US13/257,860 priority Critical patent/US20120170526A1/en
Priority to EP09848417.3A priority patent/EP2469948A4/en
Publication of WO2011020276A1 publication Critical patent/WO2011020276A1/zh
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    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • 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) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

Definitions

  • the present invention relates to the field of communications, and in particular, to a carrier aggregation method and apparatus for a long term evolution system. Background technique
  • LTE Long Term Evolution
  • 3rd Generation Partnership Project proposes to use carrier aggregation to effectively support larger bandwidth in current wireless communication systems to meet the throughput of next-generation wireless standards.
  • Demand for indicators such as volume and peak rate.
  • Carrier aggregation is a key technology for supporting larger bandwidth in future wireless communication systems. By aggregating different carriers to form a carrier with a larger bandwidth, it supports a more powerful user terminal on the aggregated bandwidth (UT, User). Terminal ) , for example, over 100MHz bandwidth in LTE-Advanced.
  • the inventors have found that due to the traffic asymmetry between the uplink and the downlink in the wireless communication system, there will be a case where the carrier of the uplink and the downlink is asymmetric when the carrier is aggregated, if all the wireless communication networks are required.
  • the carrier resources are all backward compatible. Therefore, there is a problem that the base station (BS, Base Station), which requires complete backward compatibility for all carrier resources, is more complicated and less flexible when supporting asymmetric carrier aggregation.
  • the present invention aims to provide a carrier aggregation method for a long term evolution system, which can solve the problem When asymmetric carrier aggregation is supported in the wave aggregation process, all carrier resources are required to be completely backward compatible with the base station scheduling, which is more complicated and less flexible.
  • a carrier aggregation method for a long term evolution system comprising the steps of: forming a primary aggregate carrier according to bandwidth capabilities of all user terminals that need to be supported in a wireless communication network; determining a primary aggregation Whether the carrier meets the bandwidth capability requirement of the user terminal being served; when the primary aggregation carrier does not meet the bandwidth capability requirement of the serving user terminal, the secondary aggregation carrier is formed according to the carrier resource other than the primary aggregation carrier; and the primary aggregation carrier and the secondary aggregation are performed.
  • the carrier is aggregated to obtain a new aggregated carrier, and a new aggregated carrier is set to meet the bandwidth capability requirement of the user terminal being served.
  • the foregoing carrier aggregation method further includes: when the primary aggregate carrier meets the bandwidth capability requirement of the serving user terminal, setting the primary aggregate carrier to meet the bandwidth capability requirement of the serving user terminal.
  • the primary aggregate carrier is formed according to the bandwidth capability of all user terminals that need to be supported in the wireless communication network, and specifically includes: determining the bandwidth capability of all user terminals that need to be supported; The bandwidth capability determines the size and number of bandwidths that need to be backward compatible; according to the bandwidth size and number, select carrier resources that are fully backward compatible with the bandwidth capabilities of all user terminals that need to be supported, and form a primary aggregation carrier.
  • the method further includes: performing unified scheduling on the primary aggregate carrier and other carrier resources.
  • the primary aggregate carrier is formed according to the bandwidth capability of all the user terminals that need to be supported in the wireless communication network, and specifically includes: determining the bandwidth capability of all user terminals that need to be supported; The bandwidth capability is grouped; determine the bandwidth size and quantity that each group needs to be backward compatible; according to the bandwidth size and quantity, select the carrier resources of the bandwidth capability of all user terminals that need to be fully backward compatible, and form the primary aggregation of each group. Carrier.
  • the primary aggregate carrier is formed according to the bandwidth capability of all user terminals that need to be supported in the wireless communication network, and further includes: re-establishing the bandwidth capability of all user terminals that need to be supported according to the current state of the wireless communication network. Grouping; determining the size and number of backward compatible bandwidths required for each group after regrouping; selecting carrier resources that are fully backward compatible with the bandwidth capabilities of all user terminals that need to be supported according to the size and number of bandwidths, and forming re-grouped The primary aggregate carrier of the group.
  • carrier resources of each group are uniformly scheduled.
  • carrier resources of each group are separately scheduled.
  • the secondary aggregation carriers of each group are uniformly scheduled.
  • forming a secondary aggregation carrier according to a carrier resource other than the primary aggregation carrier specifically: selecting a carrier resource that is fully backward compatible with the bandwidth capability of the serving user terminal, and forming a secondary aggregation carrier.
  • a carrier aggregation apparatus for a long term evolution system includes: a primary aggregation carrier module, configured to be used according to all user terminals that need to be supported in a wireless communication network The bandwidth capability forms a primary aggregation carrier; the determining module is configured to determine whether the primary aggregation carrier meets the bandwidth capability requirement of the serving user terminal; and the secondary aggregation carrier module is configured to: when the primary aggregation carrier does not meet the bandwidth capability requirement of the serving user terminal And forming a secondary aggregation carrier according to the carrier resource other than the primary aggregation carrier; and a setting module, configured to aggregate the primary aggregation carrier and the secondary aggregation carrier to obtain a new aggregation carrier, and set a new aggregation carrier to satisfy the bandwidth of the serving user terminal. Capacity needs.
  • the carrier aggregation apparatus further includes: a packet module, configured to group bandwidth capabilities of all user terminals that need to be supported.
  • the base station in the foregoing embodiment first forms a primary aggregated carrier according to the bandwidth capability of all user terminals that need to be supported in the wireless communication network.
  • the resource of the primary aggregated carrier is Serving user terminal
  • the bandwidth capability is used, the spectrum efficiency is not high, and then the carrier resources other than the primary aggregation carrier are aggregated for different types of user terminals in the wireless communication network to form a secondary aggregation carrier that is incompletely backward compatible with the bandwidth capability of all user terminals, and the primary carrier
  • the aggregated carrier and the secondary aggregated carrier are aggregated to obtain a new aggregated carrier, which is used to support a user terminal with a larger bandwidth capability.
  • This embodiment effectively solves the requirement for all carrier resources when supporting asymmetric carrier aggregation by means of primary and secondary aggregated carriers.
  • the problem of reduced complexity and flexibility of the fully backward compatible base station enables the base station to implement more flexible scheduling for the carrier resources, thereby reducing the scheduling complexity.
  • FIG. 1 is a flowchart of a carrier aggregation method according to a first embodiment of the present invention
  • FIG. 2 is a flowchart of a carrier aggregation method according to a second embodiment of the present invention.
  • FIG. 3 is a structural diagram of a carrier aggregation apparatus according to a third embodiment of the present invention. detailed description
  • FIG. 1 is a flowchart of a carrier aggregation method according to a first embodiment of the present invention, where the process includes the following steps:
  • Step S101 Form a primary aggregate carrier according to bandwidth capabilities of all UTs that need to be supported in the wireless communication network.
  • Step S102 Determine whether the primary aggregate carrier meets the bandwidth capability requirement of the serving UT.
  • Step S103 If the primary aggregated carrier does not meet the bandwidth capability requirement of the serving UT, the secondary aggregated carrier is formed according to the carrier resource other than the primary aggregated carrier.
  • Step S104 The primary aggregate carrier and the secondary aggregate carrier are aggregated to obtain a new aggregate carrier, and the new aggregate carrier is set to meet the bandwidth capability requirement of the serving UT.
  • the base station in this embodiment firstly according to the bands of all UTs that need to be supported in the wireless communication network.
  • the wide capability forms a primary aggregate carrier.
  • the primary aggregated carrier cannot meet the bandwidth capability requirement of the serving UT, for example, the resource of the primary aggregated carrier is not efficient for the bandwidth capability of the serving UT, and then the carrier is not based on the primary aggregated carrier.
  • the resource is aggregated for different types of UTs in the wireless communication network to form a secondary aggregate carrier that is incompletely backward compatible with all UT bandwidth capabilities, and the primary aggregated carrier and the secondary aggregated carrier are aggregated to obtain a new aggregated carrier, which is used to support a larger bandwidth capability.
  • the problem of reducing the complexity and flexibility of the base station that requires complete backward compatibility for all carrier resources when supporting asymmetric carrier aggregation is effectively solved by the method of the primary and secondary aggregated carriers, so that the base station pairs the carrier resources. More flexible scheduling can be implemented, which reduces the complexity of scheduling.
  • the foregoing carrier aggregation method further includes: if the primary aggregated carrier meets the bandwidth capability requirement of the serving UT, setting the primary aggregated carrier to meet the bandwidth capability requirement of the serving UT.
  • the primary aggregate carrier in this embodiment satisfies the bandwidth capability requirement of the UT being served, the primary aggregate carrier is directly selected as the serving UT service. In this way, when the primary aggregated carrier is sufficient to meet the bandwidth capability requirement of the serving UT, there is no need to schedule other carrier resources, but the primary carrier is used to support the asymmetric carrier aggregation, thereby realizing the resource scheduling of the base station to the carrier.
  • FIG. 2 is a flowchart of a carrier aggregation method according to a second embodiment of the present invention, where the process includes the following steps:
  • Step S201 The BS determines the bandwidth capability of all UTs that need to be supported in the wireless communication network.
  • Step S202 The BS selects a fully backward compatible carrier resource to form a primary aggregate carrier.
  • Step S203 The BS determines the bandwidth capability of the UT being served.
  • Step S204 The BS selects a carrier resource from the primary aggregate carrier. If the primary aggregate carrier resource does not meet the bandwidth capability requirement of the serving UT, go to step S205; otherwise, go to the step.
  • Step S205 The BS selects another carrier resource from the carrier resource other than the primary aggregation carrier to form a secondary aggregation carrier, and the secondary aggregation carrier and the currently selected primary aggregation carrier resource together satisfy the bandwidth capability of the UT.
  • Step S206 The BS selects the primary and secondary aggregated carriers to form a new carrier resource to meet the bandwidth capability of the UT.
  • the secondary aggregated carrier component in this step is equivalent to Zero, that is, the primary aggregate carrier is directly used as the carrier resource serving the UT being served.
  • step S201 specifically includes: determining bandwidth capabilities of all UTs that need to be supported; determining bandwidth size and quantity that need backward compatibility according to bandwidth capabilities of all UTs that need to be supported; according to bandwidth size and quantity
  • a carrier resource that is fully backward compatible with the bandwidth capabilities of all UTs that need to be supported is selected to form a primary aggregate carrier.
  • This embodiment first determines the bandwidth capability of all UTs that need to be supported in the wireless communication network, the bandwidth capability determines the size and number of bandwidths that need to be backward compatible, and the bandwidth size and quantity that need to be backward compatible are formed when the primary aggregation carrier is formed.
  • Important parameters which in turn form a new set of new basic carriers with greater bandwidth capability and backward compatibility with the bandwidth capabilities of the UTs in existing wireless communication network systems, ie primary aggregated carriers, which can be used separately to support non- Symmetric carrier aggregation can also be aggregated with other carriers to form new larger carriers for supporting larger bandwidth capable UTs.
  • the primary aggregate carrier and other carrier resources are uniformly scheduled.
  • the new carrier formed by the primary aggregation carrier will be uniformly scheduled by the BS as a new basic carrier, which is beneficial to reducing the complexity of BS resource scheduling.
  • step S201 specifically includes: determining bandwidth capabilities of all UTs that need to be supported; grouping bandwidth capabilities of all UTs that need to be supported; and determining bandwidth sizes and quantities that each group needs to be backward compatible;
  • the carrier resources of the bandwidth capabilities of all UTs that need to be fully backward compatible are selected according to the size and number of bandwidths to form the primary aggregated carriers of each group.
  • different bandwidth capabilities of the UT are pre-packetized.
  • the selected resource forms a primary aggregated carrier
  • different carrier resources are selected to form a primary aggregated carrier set, and each subset in the set corresponds to a packet with different bandwidth capabilities, completely backward. Compatible with different bandwidth capability ratings. In doing so, the spectral efficiency is further improved.
  • the bandwidth capabilities are grouped as follows, ie, ⁇ 3 MHz, 5 MHz, 10 MHz ⁇ , ⁇ 20 MHz, 50 MHz, 100MHz ⁇ two subsets, corresponding to form a primary aggregate carrier, each subset forms at least one primary aggregate carrier, for backward compatibility with three carriers, the least common multiple of all carriers backward compatible in each subset can be selected, for the first For the subset, a carrier of 30 MHz may be selected as the primary aggregate carrier, and for the second subset, a carrier of 100 MHz may be selected as the primary aggregate carrier.
  • step S201 further includes: regrouping the bandwidth capabilities of all UTs that need to be supported according to the current state of the wireless communication network; determining the size and quantity of the backward compatible bandwidths of each group after regrouping.
  • the carrier resources that are fully backward compatible with the bandwidth capabilities of all UTs that need to be supported form a primary aggregated carrier of the regrouped groups.
  • the resources of the primary aggregation carrier in this embodiment are dynamically selected, and the BS can dynamically adjust the original state according to the current state of the wireless communication network, such as the change of the wireless communication network environment, the service status of the wireless communication system, and the distribution of the UT bandwidth capability.
  • the primary and secondary aggregated carriers may also be located at different carrier frequencies, and the positions and sizes of the primary and secondary aggregated carriers are adjusted accordingly according to the needs of carrier aggregation.
  • the embodiment can form a new primary and secondary aggregate carrier capable of supporting more bandwidth capacity according to the change of the wireless communication network environment, so that the primary and secondary carrier aggregation is more flexible and adapts to the new wireless communication network.
  • Various requirements ensure the quality of communication in wireless communication networks.
  • carrier resources of each group are uniformly scheduled.
  • the BS in this embodiment schedules a carrier resource, scheduling all the subsets of the primary aggregated carrier is unified, which is beneficial to reducing the complexity of the BS resource scheduling.
  • carrier resources of each group are separately scheduled.
  • the subsets of the primary aggregated carriers are separately scheduled, so that the BS resource scheduling is more flexible, which is beneficial to reducing the complexity of the BS resource scheduling.
  • the secondary aggregation carriers of each group are uniformly scheduled.
  • the BS in this embodiment jointly schedules all the secondary aggregation carriers in the subset to reduce the scheduling complexity.
  • forming the secondary aggregation carrier according to the carrier resource other than the primary aggregation carrier specifically includes: selecting a carrier resource that is fully backward compatible with the bandwidth capability of the serving UT to form the secondary aggregation carrier.
  • the base station in this embodiment selects other carrier resources except the primary aggregation carrier to aggregate different types of UTs in the wireless communication network to form a secondary aggregate carrier that is incompletely backward compatible with all UT bandwidth capabilities, that is, for the selection of the secondary aggregation carrier. It is not completely backward compatible with the bandwidth capabilities of all UTs, only backwards compatible with the serving UT can meet the requirements.
  • the secondary aggregate carrier can use the bandwidth capability of a specific type of UT alone or form a new larger carrier with the primary aggregated carrier to support a UT with a larger and wider capability.
  • FIG. 3 is a structural diagram of a carrier aggregation apparatus according to a third embodiment of the present invention, where the apparatus includes:
  • the primary aggregate carrier module 301 is configured to form a primary aggregate carrier according to the bandwidth capabilities of all UTs that need to be supported in the wireless communication network.
  • the determining module 302 determines whether the primary aggregate carrier satisfies the bandwidth capability requirement of the serving UT.
  • the secondary aggregation carrier module 303 is configured to: when the primary aggregation carrier does not satisfy the bandwidth of the serving UT When the capability is required, the secondary aggregation carrier is formed according to the carrier resources other than the primary aggregation carrier.
  • the setting module 304 is configured to aggregate the primary aggregate carrier and the secondary aggregate carrier to obtain a new aggregate carrier, and set a new aggregate carrier to meet the bandwidth capability requirement of the UT being served.
  • the base station in this embodiment first uses the primary aggregate carrier module 301 to form a primary aggregated carrier according to the bandwidth capabilities of all UTs that need to be supported in the wireless communication network, and then uses the determining module 302 to determine whether the primary aggregated carrier meets the bandwidth capability requirement of the serving UT. Then, the secondary aggregation carrier module 303 is used when the primary aggregation carrier cannot meet the bandwidth capability requirement of the serving UT. For example, when the resource of the primary aggregation carrier is used for the bandwidth capability of the serving UT, the spectrum efficiency is not high, and then according to the primary aggregation carrier.
  • the carrier resources are aggregated for different types of UTs in the wireless communication network to form a secondary aggregate carrier that is incompletely backward compatible with all UT bandwidth capabilities.
  • the setting module 304 aggregates the primary aggregated carrier and the secondary aggregated carrier to obtain a new aggregated carrier.
  • the UT for supporting a larger bandwidth capability effectively solves the problem that the scheduling complexity and flexibility of the base station requiring complete backward compatibility for all carrier resources are reduced when the asymmetric carrier aggregation is supported by the primary and secondary aggregation carriers. Problem, making the base station to carrier The source can implement more flexible scheduling, which reduces the complexity of scheduling.
  • the foregoing carrier aggregation apparatus further includes: a packet module, configured to group bandwidth capabilities of all UTs that need to be supported.
  • a packet module is used to pre-group the bandwidth capabilities of all UTs that need to be supported.
  • a resource is selected to form a primary aggregation carrier
  • different carrier resources are selected to form a primary aggregation carrier set, and each subset in the set corresponds to different bandwidth capabilities.
  • the grouping is fully backward compatible with different bandwidth capabilities. In doing so, the spectral efficiency is further improved.
  • the invention may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

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Description

一种用于长期演进系统的载波聚合方法及装置 技术领域
本发明涉及通信领域， 尤其涉及一种用于长期演进系统的载波聚合方 法及装置。 背景技术
在下一代的宽带无线通信网络中， 如何在当前无线通信系统的带宽下 支持更大的带宽， 成为提高小区间用户终端吞吐量及用户终端平均吞吐量 的一个关键因素。
目前， 第三代合作伙伴计划的长期演进（ LTE , Long Term Evolution ) 技术提出采用载波聚合的方式来有效地在当前的无线通信系统中支持更大 的带宽， 以满足新一代无线标准中对吞吐量、 峰值速率等指标的需求。 载 波聚合是未来无线通信系统中支持更大带宽的关键技术， 通过对不同的载 波进行聚合， 形成更大带宽的载波， 从而在聚合后的带宽上支持具有更强 能力的用户终端（ UT, User Terminal ) ,例如， LTE- Advanced中超过 100MHz 的带宽。
发明人发现由于无线通信系统中上行链路和下行链路之间的业务非对 称， 将导致载波聚合时存在上行链路和下行链路的载波非对称的情况， 如 果要求无线通信网络中所有的载波资源全部后向兼容， 那么会存在支持非 对称载波聚合时对所有载波资源都要求完全后向兼容的基站 （BS , Base Station )调度较复杂、 灵活性较低的问题。 发明内容
本发明旨在提供一种用于长期演进系统的载波聚合方法， 能够解决载 波聚合过程中支持非对称载波聚合时对所有载波资源都要求完全后向兼容 的基站调度较复杂、 灵活性较低的问题。
在本发明的实施例中， 提供了一种用于长期演进系统的载波聚合方法， 该方法包括以下步骤： 根据无线通信网络中需要支持的所有用户终端的带 宽能力形成主聚合载波； 判断主聚合载波是否满足正在服务的用户终端的 带宽能力需求； 主聚合载波不满足正在服务的用户终端的带宽能力需求时， 根据主聚合载波之外的载波资源形成辅聚合载波； 将主聚合载波与辅聚合 载波进行聚合得到新聚合载波， 并设置新聚合载波用于满足正在服务的用 户终端的带宽能力需求。
优选地， 上述载波聚合方法还包括： 主聚合载波满足正在服务的用户 终端的带宽能力需求时， 设置主聚合载波用于满足正在服务的用户终端的 带宽能力需求。
优选地， 在上述载波聚合方法中， 根据无线通信网络中需要支持的所 有用户终端的带宽能力形成主聚合载波， 具体包括： 确定需要支持的所有 用户终端的带宽能力； 根据需要支持的所有用户终端的带宽能力， 确定需 要后向兼容的带宽尺寸与数量； 根据带宽尺寸与数量， 选择完全后向兼容 需要支持的所有用户终端的带宽能力的载波资源， 并形成主聚合载波。
优选地， 在上述载波聚合方法中， 该方法还包括： 对主聚合载波与其 他载波资源进行统一调度。
优选地， 在上述载波聚合方法中， 根据无线通信网络中需要支持的所 有用户终端的带宽能力形成主聚合载波， 具体包括： 确定需要支持的所有 用户终端的带宽能力； 对需要支持的所有用户终端的带宽能力进行分组； 确定各组需要后向兼容的带宽尺寸与数量； 根据带宽尺寸与数量， 选择完 全后向兼容需要支持的所有用户终端的带宽能力的载波资源， 并形成各组 的主聚合载波。 优选地， 在上述载波聚合方法中， 根据无线通信网络中需要支持的所 有用户终端的带宽能力形成主聚合载波， 还包括： 根据无线通信网络的当 前状态对需要支持的所有用户终端的带宽能力重新分组； 确定重新分组后 的各组需要后向兼容的带宽尺寸与数量； 根据带宽尺寸与数量， 选择完全 后向兼容需要支持的所有用户终端的带宽能力的载波资源， 并形成重新分 组后的各组的主聚合载波。
优选地， 在上述载波聚合方法中， 对各组的载波资源进行统一调度。 优选地， 在上述载波聚合方法中， 各组的载波资源进行分别调度。 优选地， 在上述载波聚合方法中， 对各组的辅聚合载波进行统一调度。 优选地， 在上述载波聚合方法中， 根据主聚合载波之外的载波资源形 成辅聚合载波， 具体包括： 选择完全后向兼容正在服务的用户终端的带宽 能力的载波资源， 并形成辅聚合载波。
另一方面， 在本发明的实施例中， 还提供了一种用于长期演进系统的 载波聚合装置， 该装置包括： 主聚合载波模块， 用于根据无线通信网络中 需要支持的所有用户终端的带宽能力形成主聚合载波； 判断模块， 用于判 断主聚合载波是否满足正在服务的用户终端的带宽能力需求； 辅聚合载波 模块， 用于主聚合载波不满足正在服务的用户终端的带宽能力需求时， 根 据主聚合载波之外的载波资源形成辅聚合载波； 设置模块， 用于将主聚合 载波与辅聚合载波进行聚合得到新聚合载波， 并设置新聚合载波用于满足 正在服务的用户终端的带宽能力需求。
优选地， 上述载波聚合装置还包括： 分组模块， 用于对需要支持的所 有用户终端的带宽能力进行分组。
上述实施例中的基站首先根据无线通信网络中需要支持的所有用户终 端的带宽能力形成主聚合载波， 当主聚合载波不能满足正在服务的用户终 端的带宽能力需求时， 比如主聚合载波的资源对于正在服务的用户终端的 带宽能力使用时频谱效率不高， 再根据主聚合载波之外的载波资源针对无 线通信网络中的不同类型的用户终端进行聚合形成不完全后向兼容所有用 户终端带宽能力的辅聚合载波， 将主聚合载波与辅聚合载波进行聚合得到 新聚合载波， 用于支持更大带宽能力的用户终端， 本实施例通过主辅聚合 载波的方式有效地解决了支持非对称载波聚合时对所有载波资源都要求完 全后向兼容的基站调度复杂度与灵活性降低的问题， 使得基站对载波资源 可实施更加灵活的调度， 从而降低了调度的复杂度。 附图说明
图 1为本发明第一实施例的载波聚合方法的流程图；
图 2为本发明第二实施例的载波聚合方法的流程图；
图 3为本发明第三实施例的载波聚合装置的结构图。 具体实施方式
下面将参考附图并结合实施例， 来详细说明本发明。
第一实施例：
如图 1 所示为本发明第一实施例的载波聚合方法的流程图， 该流程包 括以下步骤：
步骤 S101、 根据无线通信网络中需要支持的所有 UT的带宽能力形成 主聚合载波。
步骤 S102、判断主聚合载波是否满足正在服务的 UT的带宽能力需求。 步骤 S103、 若主聚合载波不满足正在服务的 UT的带宽能力需求， 则 根据主聚合载波之外的载波资源形成辅聚合载波。
步骤 S104、 将主聚合载波与辅聚合载波进行聚合得到新聚合载波， 并 设置新聚合载波用于满足正在服务的 UT的带宽能力需求。
本实施例中的基站首先根据无线通信网络中需要支持的所有 UT 的带 宽能力形成主聚合载波，当主聚合载波不能满足正在服务 UT的带宽能力需 求时，比如主聚合载波的资源对于正在服务 UT的带宽能力使用时频谱效率 不高， 再根据主聚合载波之外的载波资源针对无线通信网络中的不同类型 的 UT进行聚合形成不完全后向兼容所有 UT带宽能力的辅聚合载波，将主 聚合载波与辅聚合载波进行聚合得到新聚合载波， 用于支持更大带宽能力 的 UT, 本实施例通过主辅聚合载波的方式有效地解决了支持非对称载波聚 合时对所有载波资源都要求完全后向兼容的基站调度复杂度与灵活性降低 的问题， 使得基站对载波资源可实施更加灵活的调度， 从而降低了调度的 复杂度。
优选地， 上述载波聚合方法还包括： 若主聚合载波满足正在服务的 UT 的带宽能力需求，则设置主聚合载波用于满足正在服务的 UT的带宽能力需 求。
本实施例中的主聚合载波若满足正在服务的 UT的带宽能力需求，直接 选择主聚合载波为正在服务的 UT服务。这样做，使得当主聚合载波足以满 足正在服务的 UT的带宽能力需求时，无需再调度其他载波资源， 而是单独 使用主载波支持非对称的载波聚合， 从而筒化了基站对载波的资源调度。
第二实施例：
如图 2所示为本发明第二实施例的载波聚合方法的流程图， 该流程包 括以下步骤：
步骤 S201、 BS确定无线通信网络中需要支持的所有 UT的带宽能力。 步骤 S202、 BS选择完全后向兼容的载波资源聚合形成主聚合载波。 步骤 S203、 BS确定正在服务的 UT的带宽能力。
步骤 S204、 BS从主聚合载波上选择载波资源，如果主聚合载波资源不 满足正在服务的 UT的带宽能力需求， 则转到步骤 S205; 否则， 转到步骤 步骤 S205、 BS从除了主聚合载波以外的载波资源上选择其他的载波资 源形成辅聚合载波，辅聚合载波与当前选择的主聚合载波资源共同满足 UT 的带宽能力。
步骤 S206、 BS将选择主、 辅聚合载波聚合形成新的载波资源满足 UT 的带宽能力，其中， 当主聚合载波资源满足正在服务的 UT的带宽能力需求 时， 此步骤中的辅聚合载波分量相当于零， 即直接采用主聚合载波作为服 务于正在服务的 UT的载波资源。
优选地， 在上述载波聚合方法中， 步骤 S201具体包括： 确定需要支持 的所有 UT的带宽能力；根据需要支持的所有 UT的带宽能力确定需要后向 兼容的带宽尺寸与数量； 根据带宽尺寸与数量选择完全后向兼容需要支持 的所有 UT的带宽能力的载波资源形成主聚合载波。
本实施例首先确定无线通信网络中需要支持的所有 UT的带宽能力，该 带宽能力决定着需要后向兼容的带宽尺寸与数量， 而需要后向兼容的带宽 尺寸与数量是形成主聚合载波时的重要参数， 进而据此形成新的具有更大 带宽能力并与已有无线通信网络系统中 UT 的带宽能力后向兼容的新的基 本载波集合， 即主聚合载波， 主聚合载波可单独使用支持非对称的载波聚 合， 也可与其他载波聚合形成新的更大的载波用于支持更大带宽能力的 UT。
优选地， 在上述载波聚合方法中， 对主聚合载波与其他载波资源进行 统一调度。 本实施例中主聚合载波形成的新载波将作为一个新的基本载波 由 BS统一调度， 有利于降低 BS资源调度的复杂度。
优选地， 在上述载波聚合方法中， 步骤 S201具体包括： 确定需要支持 的所有 UT的带宽能力； 对需要支持的所有 UT的带宽能力进行分组； 确定 各组需要后向兼容的带宽尺寸与数量； 根据带宽尺寸与数量选择完全后向 兼容需要支持的所有 UT的带宽能力的载波资源形成各组的主聚合载波。 本实施例将 UT的不同带宽能力进行预先分组，在选择资源形成主聚合 载波时， 选择不同的载波资源形成主聚合载波集合， 集合中的每个子集对 应于不同带宽能力的分组， 完全后向兼容不同的带宽能力分级。 这样做， 进一步提高了频谱效率。
例如， 当无线通信网络中存在以下的 UT带宽能力时， 3MHz、 5MHz、 10MHz、20MHz、50MHz、 100MHz,对带宽能力进行如下的分组，即， {3MHz、 5MHz、 10MHz}、 {20MHz、 50MHz、 100MHz}两个子集， 对应形成主聚合 载波时， 每个子集形成至少一个主聚合载波， 为了后向兼容三种载波， 可 以选择每个子集中后向兼容的所有载波的最小公倍数， 对于第一个子集， 可以选择 30MHz 的载波作为主聚合载波， 对于第二个子集， 可以选择 100MHz的载波作为主聚合载波。
优选地， 在上述载波聚合方法中， 步骤 S201还包括： 根据无线通信网 络的当前状态对需要支持的所有 UT的带宽能力重新分组；确定重新分组后 的各组需要后向兼容的带宽尺寸与数量； 根据带宽尺寸与数量选择完全后 向兼容需要支持的所有 UT 的带宽能力的载波资源形成重新分组后的各组 的主聚合载波。
本实施例中的主聚合载波的资源是动态选择的， BS可根据无线通信网 络的当前状态， 比如无线通信网络环境的变化、 无线通信系统的业务状况、 UT带宽能力分布情况， 来动态调整原来的分组资源， 主、 辅聚合载波还可 位于不同的载频， 并根据载波聚合的需要对主、 辅聚合载波的位置及尺寸 做相应的调整。 相比静态配置的情况， 本实施例能够根据无线通信网络环 境的变化， 形成能够支持更多带宽能力的新的主辅聚合载波， 使得主辅载 波聚合使用更加灵活， 适应了新无线通信网络的各种需求， 保证了无线通 信网络中的通信质量。
优选地， 在上述载波聚合方法中， 对各组的载波资源进行统一调度。 本实施例中的 BS调度载波资源时，对主聚合载波中所有子集统一调度， 有 利于降低 BS资源调度的复杂度。
优选地， 在上述载波聚合方法中， 各组的载波资源进行分别调度。 本 实施例 BS调度载波资源时， 对主聚合载波中的子集分别调度， 使得 BS资 源调度更加灵活， 有利于降低 BS资源调度的复杂度。
优选地， 在上述载波聚合方法中， 对各组的辅聚合载波进行统一调度。 本实施例中的 BS在资源调度时， 将子集中所有的辅聚合载波共同调度， 以 降低调度的复杂度。
优选地， 在上述载波聚合方法中， 根据主聚合载波之外的载波资源形 成辅聚合载波具体包括：选择完全后向兼容正在服务的 UT的带宽能力的载 波资源形成辅聚合载波。
本实施例中的基站选择除了主聚合载波的其他载波资源针对无线通信 网络中的不同类型的 UT进行聚合形成不完全后向兼容所有 UT带宽能力的 辅聚合载波， 即对于辅聚合载波的选择， 可以不完全后向兼容所有的 UT 的带宽能力， 只后向兼容正在服务的 UT就可以满足要求。辅聚合载波可以 单独使用支持特定类型 UT的带宽能力，也可以与主聚合载波形成新的更大 的载波用于支持具有更大更宽能力的 UT。
第三实施例：
如图 3所示为本发明第三实施例的载波聚合装置的结构图， 该装置包 括：
主聚合载波模块 301 , 用于根据无线通信网络中需要支持的所有 UT的 带宽能力形成主聚合载波。
判断模块 302, 判断主聚合载波是否满足正在服务的 UT的带宽能力需 求。
辅聚合载波模块 303 , 用于当主聚合载波不满足正在服务的 UT的带宽 能力需求时， 根据主聚合载波之外的载波资源形成辅聚合载波。 设置模块 304,用于将主聚合载波与辅聚合载波进行聚合得到新聚合载 波， 并设置新聚合载波用于满足正在服务的 UT的带宽能力需求。
本实施例中的基站首先采用主聚合载波模块 301 根据无线通信网络中 需要支持的所有 UT 的带宽能力形成主聚合载波， 然后采用判断模块 302 判断主聚合载波是否满足正在服务的 UT的带宽能力需求，再采用辅聚合载 波模块 303在主聚合载波不能满足正在服务 UT的带宽能力需求时，比如主 聚合载波的资源对于正在服务 UT的带宽能力使用时频谱效率不高，再根据 主聚合载波之外的载波资源针对无线通信网络中的不同类型的 UT进行聚 合形成不完全后向兼容所有 UT带宽能力的辅聚合载波，最后采用设置模块 304将主聚合载波与辅聚合载波进行聚合得到新聚合载波，用于支持更大带 宽能力的 UT, 本实施例通过主辅聚合载波的方式有效地解决了支持非对称 载波聚合时对所有载波资源都要求完全后向兼容的基站调度复杂度与灵活 性降低的问题， 使得基站对载波资源可实施更加灵活的调度， 从而降低了 调度的复杂度。
优选地， 上述载波聚合装置还包括： 分组模块， 用于对需要支持的所 有 UT的带宽能力进行分组。
本实施例采用分组模块对需要支持的所有 UT 的带宽能力进行预先分 组， 在选择资源形成主聚合载波时， 选择不同的载波资源形成主聚合载波 集合， 集合中的每个子集对应于不同带宽能力的分组， 完全后向兼容不同 的带宽能力分级。 这样做， 进一步提高了频谱效率。
从以上的描述中， 可以看出， 本发明上述的实施例有效地解决了支持 非对称载波聚合时对所有载波资源都要求完全后向兼容的基站调度复杂度 与灵活性降低的问题， 使得基站对载波资源可实施更加灵活的调度， 从而 降低了调度的复杂度。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤 可以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者 分布在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执 行的程序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来 执行， 或者将它们分别制作成各个集成电路模块， 或者将它们中的多个模 块或步骤制作成单个集成电路模块来实现。 这样， 本发明不限制于任何特 定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于 本领域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精 神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明 的保护范围之内。

Claims

权利要求书
1、 一种用于长期演进系统的载波聚合方法， 其特征在于， 该方法包括 以下步骤：
根据无线通信网络中需要支持的所有用户终端的带宽能力形成主聚合 载波；
判断所述主聚合载波是否满足正在服务的用户终端的带宽能力需求； 所述主聚合载波不满足所述正在服务的用户终端的带宽能力需求时， 根据主聚合载波之外的载波资源形成辅聚合载波；
将所述主聚合载波与所述辅聚合载波进行聚合得到新聚合载波， 并设 置所述新聚合载波用于满足所述正在服务的用户终端的带宽能力需求。
2、根据权利要求 1所述的载波聚合方法，其特征在于，该方法还包括： 所述主聚合载波满足所述正在服务的用户终端的带宽能力需求时， 设 置所述主聚合载波用于满足所述正在服务的用户终端的带宽能力需求。
3、 根据权利要求 1所述的载波聚合方法， 其特征在于， 所述根据无线 通信网络中需要支持的所有用户终端的带宽能力形成主聚合载波， 具体包 括：
确定需要支持的所有用户终端的带宽能力；
根据所述需要支持的所有用户终端的带宽能力， 确定需要后向兼容的 带宽尺寸与数量；
根据所述带宽尺寸与所述数量， 选择完全后向兼容所述需要支持的所 有用户终端的带宽能力的载波资源， 并形成主聚合载波。
4、 根据权利要求 1或 3所述的载波聚合方法， 其特征在于， 该方法还 包括： 对所述主聚合载波与其他载波资源进行统一调度。
5、 根据权利要求 1所述的载波聚合方法， 其特征在于， 所述根据无线 通信网络中需要支持的所有用户终端的带宽能力形成主聚合载波， 具体包 括：
确定需要支持的所有用户终端的带宽能力；
对所述需要支持的所有用户终端的带宽能力进行分组；
确定各组需要后向兼容的带宽尺寸与数量；
根据所述带宽尺寸与所述数量， 选择完全后向兼容所述需要支持的所 有用户终端的带宽能力的载波资源， 并形成所述各组的主聚合载波。
6、 根据权利要求 5所述的载波聚合方法， 其特征在于， 所述根据无线 通信网络中需要支持的所有用户终端的带宽能力形成主聚合载波， 还包括: 根据所述无线通信网络的当前状态对所述需要支持的所有用户终端的 带宽能力重新分组；
确定重新分组后的各组需要后向兼容的带宽尺寸与数量；
根据所述带宽尺寸与所述数量， 选择完全后向兼容所述需要支持的所 有用户终端的带宽能力的载波资源， 并形成所述重新分组后的各组的主聚 合载波。
7、 根据权利要求 5或 6所述的载波聚合方法， 其特征在于， 对各组的 载波资源进行统一调度。
8、 根据权利要求 5或 6所述的载波聚合方法， 其特征在于， 对各组的 载波资源进行分别调度。
9、 权利要求 5或 6所述的载波聚合方法， 其特征在于， 对所述各组的 辅聚合载波进行统一调度。
10、 根据权利要求 1 所述的载波聚合方法， 其特征在于， 所述根据主 聚合载波之外的载波资源形成辅聚合载波， 具体包括：
选择完全后向兼容所述正在服务的用户终端的带宽能力的载波资源， 并形成所述辅聚合载波。
11、 一种用于长期演进系统的载波聚合装置， 其特征在于， 该装置包 括：
主聚合载波模块， 用于根据无线通信网络中需要支持的所有用户终端 的带宽能力形成主聚合载波；
判断模块， 用于判断所述主聚合载波是否满足正在服务的用户终端的 带宽能力需求；
辅聚合载波模块， 用于所述主聚合载波不满足所述正在服务的用户终 端的带宽能力需求时， 根据主聚合载波之外的载波资源形成辅聚合载波； 设置模块， 用于将所述主聚合载波与所述辅聚合载波进行聚合得到新 聚合载波， 并设置所述新聚合载波用于满足所述正在服务的用户终端的带 宽能力需求。
12、 根据权利要求 11所述的载波聚合装置， 其特征在于， 该装置还包 括：
分组模块， 用于对所述需要支持的所有用户终端的带宽能力进行分组。
PCT/CN2009/076013 2009-08-18 2009-12-24 一种用于长期演进系统的载波聚合方法及装置 Ceased WO2011020276A1 (zh)

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