WO2010091545A1 - 一种协作多点传输的方法、装置和系统 - Google Patents

一种协作多点传输的方法、装置和系统 Download PDF

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Publication number
WO2010091545A1
WO2010091545A1 PCT/CN2009/070389 CN2009070389W WO2010091545A1 WO 2010091545 A1 WO2010091545 A1 WO 2010091545A1 CN 2009070389 W CN2009070389 W CN 2009070389W WO 2010091545 A1 WO2010091545 A1 WO 2010091545A1
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WIPO (PCT)
Prior art keywords
different
control channel
data channel
transmission
channel
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PCT/CN2009/070389
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English (en)
French (fr)
Inventor
任晓涛
曲秉玉
万蕾
程型清
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN2009801249095A priority Critical patent/CN102089993A/zh
Priority to EP09839868A priority patent/EP2398155A4/en
Priority to PCT/CN2009/070389 priority patent/WO2010091545A1/zh
Publication of WO2010091545A1 publication Critical patent/WO2010091545A1/zh
Priority to US13/206,965 priority patent/US20110292906A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/024Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035Resource allocation in a cooperative multipoint environment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method, device and system for coordinated multipoint transmission. Background technique
  • a third generation mobile communication system eg: WCDMA system, TD-SCDMA system and
  • the fourth generation of mobile communication systems can provide higher peak user throughput, average user throughput and edge user throughput, Users provide a better data transfer experience.
  • Cooperative multipoint transmission technology one of the key enabling technologies for fourth-generation mobile communication systems, plays an irreplaceable role in greatly improving spectrum efficiency.
  • Cooperative multipoint transmission technology refers to multiple access points (Access Points) that are geographically separated from each other to provide data transmission services for one or more users.
  • a conventional cell may include multiple access points or one access point corresponding to one cell, and these multiple access points may belong to the same base station or different base stations.
  • each access point serving the same or multiple users belong to the same base station, that is, there is a short-delay and large-capacity connection between each access point and the base station (for example: fiber connection )
  • these access points can share data with the base station through such short-latency and large-capacity connections, and the base station can issue real-time control commands to each access point through such short-latency and large-capacity connections.
  • interference coordination command, resource scheduling signaling, etc. thereby completing downlink dynamic cooperative multi-point joint transmission and uplink dynamic cooperative multi-point joint reception.
  • the access point 1, the access point 2, and the access point 3 that perform data transmission services for the terminal 1 belong to the same base station 1; and the access point 5 and access for the data transmission service of the terminal 3
  • Point 7 and access point 9 belong to different base stations
  • access point 5 belongs to base station 2
  • access point 7 and access point 9 belong to base station 3.
  • the cooperative transmission is required to include not only the data channel but also the control channel carrying the cooperation information.
  • the data channel and the control channel use the same set of available resources (such as the same access point or a set thereof), or the resource set of the control channel carrying the cooperation information is data.
  • the pattern is used for channel estimation. Since the control channel has a relatively high error rate requirement, the coverage of the control channel and the data channel often do not completely match, thus limiting the reliability of the control channel and the data channel transmission. Summary of the invention
  • Embodiments of the present invention provide a method, an apparatus, and a system for cooperative multipoint transmission, which can effectively improve the reliability of control channel and data channel transmission.
  • an embodiment of the present invention provides a method for coordinated multipoint transmission, including: allocating different resources to a control channel and a data channel carrying cooperation information; performing the control channel by using the allocated different resources. Coordinated multipoint transmission with data channels.
  • Another embodiment of the present invention provides an apparatus for coordinated multipoint transmission, comprising a resource allocation unit for allocating different resources to a control channel and data information carrying cooperative information; and transmitting coordinated multi-point transmission of a single channel.
  • a further embodiment of the present invention provides a system for coordinated multipoint transmission, including the core network, for allocating different resources to a control channel and a data channel carrying cooperative information, and using the same Performing coordinated multi-point transmission of the control channel and the data channel by using the allocated different resources; the user equipment, configured to receive data and the collaboration information on the different resources.
  • FIG. 1 is a schematic diagram of a structure of a coordinated multipoint transmission system in the prior art
  • FIG. 2 is a schematic flowchart of a coordinated multipoint transmission method according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another coordinated multipoint transmission method according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a coordinated multi-point transmission apparatus according to an embodiment of the present invention. detailed description
  • the core idea of the present invention is to allocate different resources to a control channel and a data channel carrying cooperative information; and perform coordinated multi-point transmission of the control channel and the data channel by using the allocated different resources.
  • the resource includes an access point or a set thereof, a carrier or a set thereof, a reference signal pattern or a set thereof, and a subframe, a physical resource block, a time slot, an orthogonal frequency division multiplexing symbol, a sequence, a sequence Column offsets, sequence combs, frequency hopping patterns, periods, scrambling codes, etc., and their collections.
  • the control channel carrying the cooperation information performs coordinated multi-point transmission with the data channel using completely different resources, or performs coordinated multi-point transmission using partially the same resources.
  • the present invention provides a method for cooperative multipoint transmission, including:
  • Step 21 The base station allocates an access point a or an access point set A to the control channel carrying the cooperation information, and allocates an access point b or an access point set B to the data channel.
  • Step 22 The control channel carrying the cooperation information uses the access point a or the access point set A to perform coordinated multi-point transmission of the cooperation information; the data channel uses the access point b or the access point set B to perform coordinated multi-point transmission of data;
  • the access point a, b or the access point set A, B has different serving cell groups.
  • different virtual group identification numbers can be used for identification or identification.
  • other methods may be used for the indication or the binding, which is not limited in the embodiment of the present invention.
  • the access point sets A and B in steps 21 and 22 above may have an intersection with each other, or no intersection.
  • a large amount of cooperation information needs to be transmitted from the base station eNodeB to the UE that uses the coordinated multipoint service, and the information includes:
  • control channel is used for coordinated multi-point communication.
  • these UEs do not receive or detect these control channels, or the UEs will detect the signals. The information is thrown away or cannot be detected, and only the UEs that take the coordinated multipoint transmission scheme receive or detect these control channels.
  • control channel uses the access point or the access point set different from the data channel to perform coordinated multi-point transmission, so that the control channel and the data channel are provided. Different coverage, thus reducing the bit error rate of the control channel and improving the reliability of control channel and data channel transmission.
  • Step 23 In performing the coordinated multipoint transmission, when the data channel needs to be changed, switching the data channel and And maintaining the control channel carrying the cooperation information unchanged; or, when the control channel carrying the cooperation information needs to be changed, switching the control channel and keeping the data channel unchanged.
  • the transformation is embodied by: changes in the set of access points or access points, spatial diversity of data channels/control channels, spatial multiplexing, etc.
  • the optimized embodiment of the present invention can also enhance the application flexibility of the coordinated multi-point transmission scheme, and the service cell group of the data channel and/or the control channel can be truly slid to adapt to different applications and wireless channel environments, thereby improving System flexibility.
  • the present invention provides another method for cooperative multipoint transmission, including:
  • Step 31 The base station allocates carrier a or carrier set A to the control channel carrying the cooperation information, and allocates carrier b or carrier set B to the data channel.
  • the carrier a, b or carrier set A, B may be different component carriers in a Carrier Aggregation system.
  • the control channel carrying the cooperation information is mapped to a secondary carrier (Non home carrier) for coordinated multipoint transmission, and the basic control channel is mapped to a home carrier for coordinated multipoint transmission.
  • the cooperation information carried by the control channel can be mapped to the first 1/2/3/4 symbols of the Non home carrier, and other symbols of the Non home carrier can still be used to transmit the service data.
  • Step 32 The control channel carrying the cooperation information uses the carrier a or the carrier set A to perform coordinated multi-point transmission of the cooperative information, and the data channel uses the carrier b or the carrier set B to perform data cooperation. Transmission; wherein the carrier or carrier set A, B has different carrier physical frequencies.
  • Step 33 In performing the coordinated multi-point transmission, when the data channel needs to be changed, the data channel is switched and the control channel carrying the cooperation information is kept unchanged; or, when the cooperation information is carried When the control channel needs to change, the control channel is switched and the data channel is kept unchanged.
  • the transformation is embodied by: changes in the carrier or carrier set, spatial diversity of the data channel/control channel, spatial multiplexing, and the like.
  • the cooperation information carried by the control channel is used for coordinated multi-point communication.
  • these UEs do not receive or detect these control channels, or the UEs will detect the signals.
  • the information is thrown away or cannot be detected, and only the UEs that take the coordinated multi-point transmission scheme receive or detect these control channels, and the inherited UE does not have to receive and detect.
  • the newly added cooperation information does not need to be placed in the control channel of the inherited UE, but is placed in the new control channel of the Non-home Carrier, so that the backward compatibility problem can be well solved.
  • the cooperative multi-point transmission method provided by the embodiment of the present invention, because the control channel uses coordinated carrier or carrier set different from the data channel for coordinated multi-point transmission, so that the control channel and the data channel have different coverage ranges, thereby reducing the error of the control channel. Rate, improving the reliability of control channel and data channel transmission.
  • the control channel used to transmit the cooperative information can be separated from the physical downlink shared channel, independent of the data channel, when the data channel changes, the control channel used to transmit the cooperative information can remain unchanged, or When the control channel changes, the data channel may not change, that is, the two may not switch at the same time. Therefore, the embodiment of the present invention can also enhance the application flexibility of the coordinated multi-point transmission scheme, and the service cell group of the data channel and/or the control channel can be truly slid to adapt to different applications and wireless channel environments, thereby improving the system. Flexibility.
  • the present invention provides another method for cooperative multipoint transmission, including:
  • Step 41 The base station allocates a reference signal pattern a or a pattern set to a control channel carrying the cooperation information.
  • the reference signal pattern b or pattern set B is assigned to the data channel.
  • Step 42 The control channel carrying the cooperation information uses the reference signal pattern a or the pattern set A to perform coordinated multi-point transmission of the cooperation information, and the data channel uses the reference signal pattern b or the pattern set B to perform coordinated multi-point transmission of data; the reference signal
  • the pattern includes any one or combination of the position, density or sequence of the reference signal, sequence offset or orthogonal code.
  • Step 43 In performing the coordinated multi-point transmission, when the data channel needs to be changed, the data channel is switched and the control channel carrying the cooperation information is kept unchanged; or, when the cooperation information is carried When the control channel needs to change, the control channel is switched and the data channel is kept unchanged.
  • the embodiments of the present invention may be used for channel estimation, where reference signal patterns a, b or sets A and B thereof may use different frequency division multiplexing (FDM), time division multiplexing (TDM), and time division multiplexing (TDM). Or any combination or combination of code division multiplexing (CDM), or reference signal pattern a, b or its set A, B in density, sequence, sequence offset or orthogonal code One or part is different.
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • TDM time division multiplexing
  • TDM time division multiplexing
  • CDM code division multiplexing
  • control channel is used for coordinated multi-point communication.
  • these UEs do not receive or detect these control channels, or these UEs will detect The outgoing information is thrown away or cannot be detected. Only the UEs that use the coordinated multipoint transmission scheme will receive or detect these control channels.
  • the cooperative multi-point transmission method provided by the embodiment of the present invention can reduce the control by using the reference signal pattern or the pattern set different from the data channel for coordinated multi-point transmission, so that the control channel and the data channel have different coverage ranges.
  • the bit error rate of the channel improves the reliability of the control channel and data channel transmission.
  • the control channel used to transmit the cooperative information can be separated from the physical downlink shared channel, independent of the data channel, when the data channel changes, the control channel used to transmit the cooperative information can remain unchanged, or When the control channel changes, the data channel does not change, that is, the two can be switched at different times. Therefore, the embodiment of the present invention can also enhance the application flexibility of the coordinated multi-point transmission scheme, and let the data channel and/or the control channel
  • the service community is truly slid to accommodate different applications and wireless channel environments, increasing system flexibility.
  • the method for cooperative multi-point transmission provided by the present invention is described above with reference to specific embodiments. It should be noted that the present invention is applicable not only to OFDM systems but also to CDMA systems, TDMA systems, and other mobile communication systems.
  • the embodiment of the present invention further provides an apparatus and system for cooperative multipoint transmission.
  • an apparatus for coordinated multipoint transmission includes: a resource allocation unit 51, configured to allocate different resources to a control channel and data information carrying cooperative information.
  • the transmitting unit 52 is configured to perform coordinated multi-point transmission of the control channel and the data channel by using different resources allocated by the resource allocating unit 51.
  • the resource allocation unit 51 is configured to allocate one of the following resources or any combination thereof to the control channel and the data information carrying the cooperation information: different access points or their sets, different carriers or their sets, different references a signal pattern or a set thereof, a different subframe or a set thereof, a different physical resource block or a set thereof, a different time slot or a set thereof, a different orthogonal frequency division multiplexing symbol or a set thereof, a different sequence or Its set, different sequence offsets or sets thereof, different sequence combs or sets thereof, different frequency hopping patterns or sets thereof, different periods or sets thereof, different scrambling codes or a set thereof.
  • the transmission unit 52 includes any one of the following modules or combinations of modules:
  • An access point transmission module configured to perform coordinated multi-point transmission of the control channel and the data channel by using different access points or a set thereof;
  • a carrier transmission module configured to perform coordinated multi-point transmission of the control channel and the data channel by using different carriers or a set thereof;
  • a reference signal pattern module for performing the control using different reference signal patterns or a set thereof Coordinated multipoint transmission of channel and data channel;
  • a subcarrier transmission module configured to perform coordinated multipoint transmission of the control channel and the data channel by using different subcarriers or a set thereof;
  • a resource block transmission module configured to perform coordinated multi-point transmission of the control channel and the data channel by using different physical resource blocks or a set thereof;
  • a subframe transmission module configured to perform coordinated multipoint transmission of the control channel and the data channel by using different subframes or a set thereof;
  • a time slot module configured to perform coordinated multi-point transmission of the control channel and the data channel by using different time slots or a set thereof;
  • An orthogonal frequency division transmission module configured to perform coordinated multipoint transmission of the control channel and the data channel by using different orthogonal frequency division multiplexing symbols or a set thereof;
  • a sequence module configured to perform coordinated multipoint transmission of the control channel and the data channel using different sequences or a set thereof
  • a sequence offset transmission module configured to perform coordinated multi-point transmission of the control channel and the data channel by using different sequence offsets or a set thereof;
  • a sequence comb transmission module configured to perform coordinated multi-point transmission of the control channel and the data channel by using different sequence combs or a set thereof;
  • a frequency hopping pattern transmission module configured to perform coordinated multipoint transmission of the control channel and the data channel by using different hopping patterns or a set thereof;
  • a periodic module configured to perform coordinated multi-point transmission of the control channel and the data channel by using different periods or a set thereof;
  • a scrambling code transmission module is configured to perform coordinated multi-point transmission of the control channel and the data channel using different scrambling codes or a set thereof.
  • the apparatus provided by the embodiment of the present invention further includes:
  • the switching unit 53 is configured to: when the data channel needs to be changed in the coordinated multi-point transmission by the transmitting unit 52, switch the data channel and maintain the control information carrying the cooperation information The channel is unchanged; or, when the control channel carrying the cooperation information needs to be changed, the control channel is switched and the data channel is kept unchanged.
  • control channel is used for coordinated multi-point communication.
  • these UEs do not receive or detect these control channels, or the UEs will detect the signals. The information is thrown away or cannot be detected, and only the UEs that take the coordinated multipoint transmission scheme receive or detect these control channels.
  • the apparatus for cooperative multi-point transmission provided by the embodiment of the present invention allocates different resources to the control channel and the data information carrying the cooperation information by the resource allocation unit 51, and performs coordinated multi-point transmission by using the resources different from the data channel by the transmission unit 52.
  • the control channel and the data channel have different coverage areas, so the error rate of the control channel can be reduced, and the reliability of the control channel and the data channel transmission can be improved.
  • the switching unit 53 realizes when the data channel changes.
  • the control channel used to transmit the cooperative information may remain unchanged, or when the control channel changes, the data channel does not change, that is, the two may not be switched at the same time. Therefore, the embodiment of the present invention can also enhance the application flexibility of the coordinated multi-point transmission scheme, and the service cell group of the data channel and/or the control channel can be truly slid to adapt to different applications and wireless channel environments, thereby improving the system. Flexibility.
  • the embodiment of the present invention further provides a system for cooperative multi-point transmission, including a base station device, where the base station device is configured to allocate different resources to a control channel and a data channel carrying cooperative information, and use the allocated different resources. Coordinated multipoint transmission of the control channel and the data channel is performed.
  • the base station device is specifically configured to use different access points or a set thereof, different carriers or a set thereof, different reference signal patterns or a set thereof, different subcarriers or a set thereof, different physical resource blocks or a set thereof, Different subframes or sets thereof, different time slots or sets thereof, different orthogonal frequency division multiplexing symbols or sets thereof, different sequences or sets thereof, different sequence offsets or sets thereof, different sequences Combs or sets thereof, different hopping patterns or sets thereof, different periods or collections thereof, Cooperative multipoint transmission of the control channel and data channel is performed by one or a combination of different scrambling codes or a set thereof.
  • the base station device is further configured to: when the data channel needs to be changed, when the data channel needs to be changed, switch the data channel and keep the control channel carrying the cooperation information unchanged; or When the control channel carrying the cooperation information needs to change, the control channel is switched and the data channel is kept unchanged.
  • control channel is used for coordinated multi-point communication.
  • these UEs do not receive or detect these control channels, or the UEs will detect the signals. The information is thrown away or cannot be detected, and only the UEs that take the coordinated multipoint transmission scheme receive or detect these control channels.
  • the base station device allocates different resources to the control channel and the data channel carrying the cooperation information, and uses the allocated different resources to perform cooperation between the control channel and the data channel.
  • the point transmission makes the control channel and the data channel have different coverage areas, so the error rate of the control channel can be reduced, and the reliability of the control channel and the data channel transmission can be improved.
  • the control channel used to transmit the cooperative information can be separated from the physical downlink shared channel, independent of the data channel, when the data channel changes, the control channel used to transmit the cooperative information can remain unchanged, or When the control channel changes, the data channel does not change, that is, the two can be switched at different times. Therefore, the embodiment of the present invention can also enhance the application flexibility of the coordinated multi-point transmission scheme, and the service cell group of the data channel and/or the control channel can be truly slid to adapt to different applications and wireless channel environments, thereby improving the system. Flexibility.
  • the storage medium may be a magnetic disk, an optical disk, a read only memory (ROM) or a random access memory (RAM).
  • ROM read only memory
  • RAM random access memory
  • Each functional unit in the embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated modules if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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Description

一种协作多点传输的方法、 装置和系统 技术领域
本发明涉及移动通信技术领域, 尤其涉及一种协作多点传输的方法、 装 置和系统。 背景技术
作为第三代移动通信系统(比如: WCDMA 系统, TD-SCDMA 系统和
CDMA2000系统)和后三代移动通信系统(比如: LTE R8系统, UMB系统) 的替代者, 第四代移动通信系统可以提供更高的峰值用户吞吐率, 平均用户 吞吐率和边缘用户吞吐率, 向用户提供更佳的数据传输体验。 而作为第四代 移动通信系统的重要关键使能技术之一的协作多点传输技术, 在大幅度提升 频谱效率方面发挥着不可替代的作用。
协作多点传输技术是指:地理位置上相互分离的多个接入点 (Access Point) 同时为一个或多个用户提供数据传输服务。 传统的一个小区中可能包括多个 接入点或者一个接入点相当于一个小区, 并且, 这些多个接入点可以隶属于 同一个基站或者不同的基站。
如果同时为同一个或多个用户提供服务的多个接入点隶属于同一个基 站, 也就是说, 在每个接入点和基站之间有短时延大容量的连接(比如: 光 纤连接) 的话, 这些接入点可以通过这种短时延大容量的连接和基站之间进 行数据共享, 并且, 基站可以通过这种短时延大容量的连接向各个接入点发 布实时的控制命令(比如: 干扰协调指令, 资源调度信令等), 从而完成下行 动态协作多点联合发射和上行动态协作多点联合接收。
而如果同时为同一个或多个用户提供服务的多个接入点隶属于不同的基 站, 由于基站之间的接口的限制 (一般我们认为基站之间仅有长时延小容量 的接口, 比如 X2接口),基站之间的实时数据无法实现共享。在这种情况下, 静态或者半静态的协调发射与接收仍然是可行的, 比如协调波束成形方案等, 但是动态的协调难以做到。
如图 1所示, 为终端 1进行数据传输服务的接入点 1、接入点 2和接入点 3属于同一个基站 1 ; 而为终端 3进行数据传输服务的接入点 5、 接入点 7和 接入点 9属于不同的基站,接入点 5属于基站 2,接入点 7和接入点 9属于基 站 3。 如上所述, 对于协作多点传输技术而言, 需要进行协作传输的不仅仅包 括数据信道, 还包括携带协作信息的控制信道。
在实现本发明过程中, 发明人研究发现:
在目前的协作多点传输方案中, 通常是认为数据信道和控制信道釆用相 同的可用资源集合(如相同的接入点或其集合等), 或者携带协作信息的控制 信道的资源集合是数据信道的资源集合的一个子集; 另外, 在目前的多点传 输系统中, 参考信号图案设计没有区分控制信道和数据信道, 或者说, 对于 控制信道和数据信道而言, 他们使用相同的参考信号图案进行信道估计。 由 于控制信道对误码率的要求相对较高, 控制信道与数据信道的覆盖范围往往 不完全匹配, 这样, 就限制了控制信道和数据信道传输的可靠性。 发明内容
本发明实施例提供一种协作多点传输的方法、 装置和系统, 能够有效提 高控制信道和数据信道传输的可靠性。
具体的, 本发明的一个实施例提供了一种协作多点传输的方法, 包括: 向携带协作信息的控制信道和数据信道分配不同的资源; 使用所述分配的不 同的资源进行所述控制信道和数据信道的协作多点传输。
本发明的另一个实施例提供了一种协作多点传输的装置, 包括资源分配 单元, 用于向携带协作信息的控制信道和数据信息分配不同的资源; 传输单 信道的协作多点传输。
本发明的再一个实施例提供了一种协作多点传输的系统, 包括所述核心 网, 用于向携带协作信息的控制信道和数据信道分配不同的资源, 并使用所 述分配的不同的资源进行所述控制信道和数据信道的协作多点传输; 所述用 户设备, 用于在所述不同的资源上接收数据和所述协作信息。
通过上述技术方案的描述可知, 由于控制信道使用不同于数据信道的资 源进行协作多点传输, 使得控制信道与数据信道的具有不同的覆盖范围, 因 此能够降低控制信道的误码率, 提高控制信道和数据信道传输的可靠性。 附图说明 施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下 面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1是现有技术中协作多点传输系统架构示意图;
图 2为本发明实施例提供的一种协作多点传输方法的流程示意图; 图 3为本发明实施例提供的另一种协作多点传输方法的流程示意图; 图 4为本发明实施例提供的再一种协作多点传输方法的流程示意图; 图 5为本发明实施例提供的一种协作多点传输装置的结构示意图。 具体实施方式
为使本发明的目的、 技术方案、 及优点更加清楚明白, 下面结合附图并 举实施例, 对本发明提供的技术方案进一步详细描述。 显然, 所描述的实施 例仅仅是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施 例, 本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实 施例, 都属于本发明保护的范围。
本发明的核心思想是向携带协作信息的控制信道和数据信道分配不同的 资源; 使用所述分配不同的资源进行所述控制信道和数据信道的协作多点传 输。 其中, 所述资源包括接入点或其集合、 载波或其集合、 参考信号图案或 其集合, 以及子帧、 物理资源块、 时隙、 正交频分多路复用符号、 序列、 序 列偏移、 序列梳齿、 跳频图案、 周期、 扰码等以及它们的集合。 并且, 所述 携带协作信息的控制信道与所述数据信道使用完全不同的资源进行协作多点 传输, 或者使用部分相同的资源进行协作多点传输。
参见图 2, 本发明提供了一种协作多点传输的方法, 包括:
步骤 21 ,基站向携带协作信息的控制信道分配接入点 a或接入点集合 A, 向数据信道分配接入点 b或接入点集合 B。
步骤 22, 携带协作信息的控制信道使用接入点 a或接入点集合 A进行协 作信息的协作多点传输; 数据信道使用接入点 b或接入点集合 B进行数据的 协作多点传输; 其中, 所述接入点 a、 b或接入点集合 A、 B具有不同的服务 小区群。 例如可以使用不同的虚拟群识别号 ( Virtual Serving Cell group ID ) 进行识别或标识。 当然也可以使用其它方法进行指示或绑定, 本发明实施例 对此不做限定。
在上述步骤 21和 22中的接入点集合 A和 B可以彼此之间有交集, 或者 没有交集。
对于协作多点传输而言,大量的协作信息需要从基站 eNodeB传递给釆用 协作多点服务的 UE, 这些信息包括有:
(1) 多点服务时, 同时为该 UE提供传输服务的多个小区的 Cell ID或者 为该 UE提供服务的小区群的 group cell ID;
(2)每个 serving cell的发射权重因子或者预编码矩阵指示;
(3) 用户协作多点传输的时频资源。
需要说明的是, 控制信道承载的协作信息是用于协作多点通信的, 对于 不接受协作多点服务的 UE而言, 这些 UE不会接收或检测这些控制信道, 或 者这些 UE将检测出来的信息扔掉或检测不出这些信息,只有釆取协作多点传 输方案的 UE, 才会接收或检测这些控制信道。
本发明实施例提供的协作多点传输方法, 由于控制信使用不同于数据信 道的接入点或接入点集合进行协作多点传输, 使得控制信道与数据信道的具 有不同的覆盖范围, 因此能够降低控制信道的误码率, 提高控制信道和数据 信道传输的可靠性。
一种优化实施例, 仍参见图 2, 本发明实施例提供的方法还包括: 步骤 23 , 在进行所述协作多点传输中, 当所述数据信道需要发生变化时, 切换所述数据信道且保持所述携带协作信息的控制信道不变; 或者, 当所述 携带协作信息的控制信道需要发生变化时, 切换所述控制信道且保持所述数 据信道不变。
所述变换体现在: 接入点或接入点集合的变化、 数据信道 /控制信道的空 间分集、 空间复用等传输模式的变化。
由于用来传输协作信息的控制信道可以和物理下行链路共享信道分离, 独立于数据信道之外, 在数据信道发生变化时, 用来传输协作信息的控制信 道可以保持不变, 或者当控制信道发生变化时, 数据信道不发生改变, 也就 是说两者可以不同时进行切换。 因此, 本发明优化实施例还可以增强协作多 点传输方案的应用灵活性, 让数据信道和 /或控制信道的服务小区群真正的滑 动起来, 以适应不同的应用场合和无线信道环境, 提高了系统的灵活性。
参见图 3 , 本发明提供了另一种协作多点传输的方法, 包括:
步骤 31 , 基站向携带协作信息的控制信道分配载波 a或载波集合 A, 向 数据信道分配载波 b或载波集合 B。
具体地,载波 a、 b或载波集合 A、 B可以是载波聚合( Carrier Aggregation ) 系统中的不同的成员载波 (Component Carrier)。 将携带协作信息的控制信道映 射到副载波(Non home carrier )上进行协作多点传输, 将基本的控制信道映 射到主载波(home carrier )上进行协作多点传输。 例如, 将控制信道承载的 协作信息可以映射到 Non home carrier的前 1/2/3/4个符号( Symbol )上, Non home carrier的其它符号依然可以用来传输业务数据。
步骤 32, 携带协作信息的控制信道使用载波 a或载波集合 A进行协作信 息的协作多点传输, 数据信道使用载波 b或载波集合 B进行数据的协作多点 传输; 其中, 所述载波^ b或载波集合 A、 B具有不同的载波物理频率。 步骤 33 , 在进行所述协作多点传输中, 当所述数据信道需要发生变化时, 切换所述数据信道且保持所述携带协作信息的控制信道不变; 或者, 当所述 携带协作信息的控制信道需要发生变化时, 切换所述控制信道且保持所述数 据信道不变。
所述变换体现在: 载波或载波集合的变化、 数据信道 /控制信道的空间分 集、 空间复用等传输模式的变化。
需要说明的是, 控制信道承载的协作信息是用于协作多点通信的, 对于 不接受协作多点服务的 UE而言, 这些 UE不会接收或检测这些控制信道, 或 者这些 UE将检测出来的信息扔掉或检测不出这些信息,只有釆取协作多点传 输方案的 UE才会接收或检测这些控制信道,继承的 UE不必进行接收和检测。 同时, 新增加的协作信息不必放在继承的 UE 的控制信道中, 而是放在 Non-home Carrier 的新增控制信道中, 从而, 可以很好地解决后向兼容性 ( backward compatibility ) 问题。
本发明实施例提供的协作多点传输方法, 由于控制信道使用不同于数据 信道的载波或载波集合进行协作多点传输, 使得控制信道与数据信道具有不 同的覆盖范围, 因此能够降低控制信道的误码率, 提高控制信道和数据信道 传输的可靠性。 而且, 由于用来传输协作信息的控制信道可以和物理下行链 路共享信道分离, 独立于数据信道之外, 在数据信道发生变化时, 用来传输 协作信息的控制信道可以保持不变, 或者当控制信道发生变化时, 数据信道 可以不发生改变, 也就是说两者可以不同时进行切换。 因此, 本发明实施例 还可以增强协作多点传输方案的应用灵活性, 让数据信道和 /或控制信道的服 务小区群真正的滑动起来, 以适应不同的应用场合和无线信道环境, 提高了 系统的灵活性。
参见图 4, 本发明提供了再一种协作多点传输的方法, 包括:
步骤 41 , 基站向携带协作信息的控制信道分配参考信号图案 a或图案集 合 A, 向数据信道分配参考信号图案 b或图案集合 B。
步骤 42, 携带协作信息的控制信道使用参考信号图案 a或图案集合 A进 行协作信息的协作多点传输, 数据信道使用参考信号图案 b或图案集合 B进 行数据的协作多点传输; 所述参考信号图案包括参考信号的位置、 密度或序 列、 序列偏移或正交码等中任一种或组合。
步骤 43 , 在进行所述协作多点传输中, 当所述数据信道需要发生变化时, 切换所述数据信道且保持所述携带协作信息的控制信道不变; 或者, 当所述 携带协作信息的控制信道需要发生变化时, 切换所述控制信道且保持所述数 据信道不变。
本发明实施例可以用于进行信道估计, 其中参考信号图案 a、 b或其集合 A、 B可以使用不同的频分复用 (FDM, Frequency Division Multiplexing ), 时 分复用(TDM, Time Division Multiplexing )或码分复用(CDM, Code Division Multiplexing )的任一种或组合来进行区分, 或者参考信号图案 a、 b或其集合 A、 B中的密度、 序列、 序列偏移或正交码中的一个或部分不同。
需要说明的是, 控制信道承载的协作信息是用于协作多点通信的, 对于 不接受协作多点服务的用户设备 UE而言,这些 UE不会接收或检测这些控制 信道,或者这些 UE将检测出来的信息扔掉或检测不出这些信息, 只有釆取协 作多点传输方案的 UE, 才会接收或检测这些控制信道。
本发明实施例提供的协作多点传输方法, 由于控制信使用不同于数据信 道的参考信号图案或图案集合进行协作多点传输, 使得控制信道与数据信道 的具有不同的覆盖范围, 因此能够降低控制信道的误码率, 提高控制信道和 数据信道传输的可靠性。 而且, 由于用来传输协作信息的控制信道可以和物 理下行链路共享信道分离, 独立于数据信道之外, 在数据信道发生变化时, 用来传输协作信息的控制信道可以保持不变, 或者当控制信道发生变化时, 数据信道不发生改变, 也就是说两者可以不同时进行切换。 因此, 本发明实 施例还可以增强协作多点传输方案的应用灵活性, 让数据信道和 /或控制信道 的服务小区群真正的滑动起来, 以适应不同的应用场合和无线信道环境, 提 高了系统的灵活性。
以上釆用具体实施例对本发明提供的协作多点传输的方法进行说明, 需 要说明的是本发明除可以用于 OFDM系统外 ,也适用于 CDMA系统、 TDMA 系统及其他移动通信系统。
相应于本发明提供的协作多点传输的方法实施例, 本发明实施例还提供 了协作多点传输的装置和系统。
参见图 5, 本发明实施例提供的一种协作多点传输的装置, 包括: 资源分配单元 51 , 用于向携带协作信息的控制信道和数据信息分配不同 的资源。
传输单元 52,用于使用所述资源分配单元 51分配的不同的资源进行所述 控制信道和数据信道的协作多点传输。
具体地, 该资源分配单元 51用于向携带协作信息的控制信道和数据信息 分配下述资源之一或其任意组合: 不同的接入点或其集合、 不同的载波或其 集合、 不同的参考信号图案或其集合, 不同的子帧或其集合、 不同的物理资 源块或其集合、 不同的时隙或其集合、 不同的正交频分多路复用符号或其集 合、 不同的序列或其集合、 不同的序列偏移或其集合、 不同的序列梳齿或其 集合、 不同的跳频图案或其集合、 不同的周期或其集合、 不同的扰码或其集 合。
与资源分配单元 51相应的, 具体地, 传输单元 52包括如下任一模块或 模块组合:
接入点传输模块, 用于使用不同的接入点或其集合进行所述控制信道和 数据信道的协作多点传输;
载波传输模块, 用于使用不同的载波或其集合进行所述控制信道和数据 信道的协作多点传输;
参考信号图案模块, 用于使用不同的参考信号图案或其集合进行所述控 制信道和数据信道的协作多点传输;
子载波传输模块, 用于使用不同的子载波或其集合进行所述控制信道和 数据信道的协作多点传输;
资源块传输模块, 用于使用不同的物理资源块或其集合进行所述控制信 道和数据信道的协作多点传输;
子帧传输模块, 用于使用不同的子帧或其集合进行所述控制信道和数据 信道的协作多点传输;
时隙模块, 用于使用不同的时隙或其集合进行所述控制信道和数据信道 的协作多点传输;
正交频分传输模块, 用于使用不同的正交频分多路复用符号或其集合进 行所述控制信道和数据信道的协作多点传输;
序列模块, 用于使用不同的序列或其集合进行所述控制信道和数据信道 的协作多点传输;
序列偏移传输模块, 用于使用不同的序列偏移或其集合进行所述控制信 道和数据信道的协作多点传输;
序列梳齿传输模块, 用于使用不同的序列梳齿或其集合进行所述控制信 道和数据信道的协作多点传输;
跳频图案传输模块, 用于使用不同的跳频图案或其集合进行所述控制信 道和数据信道的协作多点传输;
周期模块, 用于使用不同的周期或其集合进行所述控制信道和数据信道 的协作多点传输;
扰码传输模块, 用于使用不同的扰码或其集合进行所述控制信道和数据 信道的协作多点传输。
优选地, 本发明实施例提供的装置还包括:
切换单元 53 , 用于在所述传输单元 52进行协作多点传输中, 当所述数据 信道需要发生变化时, 切换所述数据信道且保持所述携带协作信息的控制信 道不变; 或者, 当所述携带协作信息的控制信道需要发生变化时, 切换所述 控制信道且保持所述数据信道不变。
需要说明的是, 控制信道承载的协作信息是用于协作多点通信的, 对于 不接受协作多点服务的 UE而言, 这些 UE不会接收或检测这些控制信道, 或 者这些 UE将检测出来的信息扔掉或检测不出这些信息,只有釆取协作多点传 输方案的 UE, 才会接收或检测这些控制信道。
本发明实施例提供的协作多点传输的装置, 通过资源分配单元 51向携带 协作信息的控制信道和数据信息分配不同的资源, 并通过传输单元 52使用不 同于数据信道的资源进行协作多点传输, 使得控制信道与数据信道的具有不 同的覆盖范围, 因此能够降低控制信道的误码率, 提高控制信道和数据信道 传输的可靠性。 而且, 由于用来传输协作信息的控制信道可以和物理下行链 路共享信道分离,独立于数据信道之外,在传输单元 52进行协作多点传输中 , 由切换单元 53实现当数据信道发生变化时, 用来传输协作信息的控制信道可 以保持不变, 或者当控制信道发生变化时, 数据信道不发生改变, 也就是说 两者可以不同时进行切换。 因此, 本发明实施例还可以增强协作多点传输方 案的应用灵活性, 让数据信道和 /或控制信道的服务小区群真正的滑动起来, 以适应不同的应用场合和无线信道环境, 提高了系统的灵活性。
本发明实施例还提供一种协作多点传输的系统, 包括基站设备, 所述基站设备, 用于向携带协作信息的控制信道和数据信道分配不同的 资源, 并使用所述分配的不同的资源进行所述控制信道和数据信道的协作多 点传输。
所述基站设备具体用于使用不同的接入点或其集合、 不同的载波或其集 合、 不同的参考信号图案或其集合、 不同的子载波或其集合、 不同的物理资 源块或其集合、 不同的子帧或其集合、 不同的时隙或其集合、 不同的正交频 分多路复用符号或其集合、 不同的序列或其集合、 不同的序列偏移或其集合、 不同的序列梳齿或其集合、 不同的跳频图案或其集合、 不同的周期或其集合、 不同的扰码或其集合中之一或组合进行所述控制信道和数据信道的协作多点 传输。
所述基站设备, 还用于在进行所述协作多点传输中, 当所述数据信道需 要发生变化时, 切换所述数据信道且保持所述携带协作信息的控制信道不变; 或者, 当所述携带协作信息的控制信道需要发生变化时, 切换所述控制信道 且保持所述数据信道不变。
需要说明的是, 控制信道承载的协作信息是用于协作多点通信的, 对于 不接受协作多点服务的 UE而言, 这些 UE不会接收或检测这些控制信道, 或 者这些 UE将检测出来的信息扔掉或检测不出这些信息,只有釆取协作多点传 输方案的 UE, 才会接收或检测这些控制信道。
本发明实施例提供的协作多点传输系统, 由于基站设备向携带协作信息 的控制信道和数据信道分配不同的资源, 并使用所述分配的不同的资源进行 所述控制信道和数据信道的协作多点传输, 使得控制信道与数据信道的具有 不同的覆盖范围, 因此能够降低控制信道的误码率, 提高控制信道和数据信 道传输的可靠性。 而且, 由于用来传输协作信息的控制信道可以和物理下行 链路共享信道分离, 独立于数据信道之外, 在数据信道发生变化时, 用来传 输协作信息的控制信道可以保持不变, 或者当控制信道发生变化时, 数据信 道不发生改变, 也就是说两者可以不同时进行切换。 因此, 本发明实施例还 可以增强协作多点传输方案的应用灵活性, 让数据信道和 /或控制信道的服务 小区群真正的滑动起来, 以适应不同的应用场合和无线信道环境, 提高了系 统的灵活性。
最后需要说明的是, 本领域普通技术人员可以理解实现上述实施例方法 中的全部或部分流程, 是可以通过计算机程序来指令相关的硬件来完成, 所 述的程序可存储于一计算机可读取存储介质中, 该程序在执行时, 可包括如 上述各方法的实施例的流程。 其中, 所述的存储介质可为磁碟、 光盘、 只读 存储记忆体 ( ROM )或随机存储记忆体 ( RAM )等。 本发明实施例中的各功能单元可以集成在一个处理模块中, 也可以是各 个单元单独物理存在, 也可以两个或两个以上单元集成在一个模块中。 上述 集成的模块既可以釆用硬件的形式实现, 也可以釆用软件功能模块的形式实 现。 所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售 或使用时, 也可以存储在一个计算机可读取存储介质中。 上述提到的存储介 质可以是只读存储器, 磁盘或光盘等。
上述具体实施例并不用以限制本发明, 对于本技术领域的普通技术人员 来说, 凡在不脱离本发明原理的前提下, 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、 一种协作多点传输的方法, 其特征在于, 包括:
向携带协作信息的控制信道和数据信道分配不同的资源;
使用所述分配的不同的资源进行所述控制信道和数据信道的协作多点传 输。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括:
在进行所述协作多点传输中, 当所述数据信道需要发生变化时, 切换所述 数据信道且保持所述携带协作信息的控制信道不变; 或者, 当所述携带协作信 息的控制信道需要发生变化时, 切换所述控制信道且保持所述数据信道不变。
3、 根据权利要求 1所述的方法, 其特征在于, 所述使用分配的不同的资源 进行所述控制信道和数据信道的协作多点传输包括:
所述携带协作信息的控制信道与所述数据信道使用完全不同的资源进行协 作多点传输, 或者使用部分相同的资源进行协作多点传输。
4、根据权利要求 1至 3中任一项所述的方法, 其特征在于, 所述资源包括: 接入点或其集合、 载波或其集合、 参考信号图案或其集合、 子载波或其集 合、 物理资源块或其集合、 子帧或其集合、 时隙或其集合、 正交频分多路复用 符号或其集合、 序列或其集合、 序列偏移或其集合、 序列梳齿或其集合、 跳频 图案或其集合、 周期或其集合、 扰码或其集合中之一或组合。
5、 根据权利要求 1所述的方法, 其特征在于, 所述使用分配的不同的资源 进行所述控制信道和数据信道的协作多点传输具体为:
使用不同的接入点或接入点集合进行所述控制信道和数据信道的协作多点 传输, 其中, 所述不同的接入点或接入点集合具有不同的服务小区群; 或者 使用不同的参考信号图案或参考信号图案集合进行所述控制信道和数据信 道的协作多点传输, 其中, 所述参考信号图案包括导频的位置、 密度、 序列、 序列偏移或正交码中任一种或组合。
6、 根据权利要求 1所述的方法, 其特征在于, 所述使用分配的不同的资源 进行所述控制信道和数据信道的协作多点传输具体为:
使用不同的载波或载波集合进行所述控制信道和数据信道的协作多点传 输, 其中, 所述不同的载波或载波集合具有不同的载波物理频率。
7、 根据权利要求 6所述的方法, 其特征在于, 所述控制信道映射到副载波 Non home carrier的特定的符号 Symbol上,所述数据信道映射到不同于所述特定 的符号的所述副载波的其它符号上。
8、 一种协作多点传输的装置, 其特征在于, 包括:
资源分配单元, 用于向携带协作信息的控制信道和数据信息分配不同的资 源; 道和数据信道的协作多点传输。
9、 根据权利要求 8所述的装置, 其特征在于, 还包括:
切换单元, 用于在所述传输单元进行协作多点传输中, 当所述数据信道需 要发生变化时, 切换所述数据信道且保持所述携带协作信息的控制信道不变; 或者, 当所述携带协作信息的控制信道需要发生变化时, 切换所述控制信道且 保持所述数据信道不变。
10、 根据权利要求 8 所述的装置, 其特征在于, 所述传输单元包括如下任 一模块或模块组合:
接入点传输模块, 用于使用不同的接入点或其集合进行所述控制信道和数 据信道的协作多点传输;
载波传输模块, 用于使用不同的载波或其集合进行所述控制信道和数据信 道的协作多点传输;
参考信号图案模块, 用于使用不同的参考信号图案或其集合进行所述控制 信道和数据信道的协作多点传输;
子载波传输模块, 用于使用不同的子载波或其集合进行所述控制信道和数 据信道的协作多点传输;
资源块传输模块, 用于使用不同的物理资源块或其集合进行所述控制信道 和数据信道的协作多点传输;
子帧传输模块, 用于使用不同的子帧或其集合进行所述控制信道和数据信 道的协作多点传输;
时隙模块, 用于使用不同的时隙或其集合进行所述控制信道和数据信道的 协作多点传输;
正交频分传输模块, 用于使用不同的正交频分多路复用符号或其集合进行 所述控制信道和数据信道的协作多点传输;
序列模块, 用于使用不同的序列或其集合进行所述控制信道和数据信道的 协作多点传输;
序列偏移传输模块, 用于使用不同的序列偏移或其集合进行所述控制信道 和数据信道的协作多点传输;
序列梳齿传输模块, 用于使用不同的序列梳齿或其集合进行所述控制信道 和数据信道的协作多点传输;
跳频图案传输模块, 用于使用不同的跳频图案或其集合进行所述控制信道 和数据信道的协作多点传输;
周期模块, 用于使用不同的周期或其集合进行所述控制信道和数据信道的 协作多点传输;
扰码传输模块, 用于使用不同的扰码或其集合进行所述控制信道和数据信 道的协作多点传输。
11、 一种协作多点传输的系统, 其特征在于, 包括基站设备,
所述基站设备 , 用于向携带协作信息的控制信道和数据信道分配不同的资 源, 并使用所述分配的不同的资源进行所述控制信道和数据信道的协作多点传 输。
12、 根据权利要求 11所述的系统, 其特征在于, 所述基站设备具体用于使 用不同的接入点或其集合、 不同的载波或其集合、 不同的参考信号图案或其集 合、 不同的子载波或其集合、 不同的物理资源块或其集合、 不同的子帧或其集 合、 不同的时隙或其集合、 不同的正交频分多路复用符号或其集合、 不同的序 列或其集合、 不同的序列偏移或其集合、 不同的序列梳齿或其集合、 不同的跳 频图案或其集合、 不同的周期或其集合、 不同的扰码或其集合中之一或组合进 行所述控制信道和数据信道的协作多点传输。
13、 根据权利要求 11所述的系统, 其特征在于,
所述基站设备, 还用于在进行所述协作多点传输中, 当所述数据信道需要 发生变化时, 切换所述数据信道且保持所述携带协作信息的控制信道不变; 或 者, 当所述携带协作信息的控制信道需要发生变化时, 切换所述控制信道且保 持所述数据信道不变。
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