WO2010034265A1 - 接入点映射到小区的方法、装置和系统 - Google Patents

接入点映射到小区的方法、装置和系统 Download PDF

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Publication number
WO2010034265A1
WO2010034265A1 PCT/CN2009/074282 CN2009074282W WO2010034265A1 WO 2010034265 A1 WO2010034265 A1 WO 2010034265A1 CN 2009074282 W CN2009074282 W CN 2009074282W WO 2010034265 A1 WO2010034265 A1 WO 2010034265A1
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WO
WIPO (PCT)
Prior art keywords
access point
cell
carrier
mapping relationship
mapping
Prior art date
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PCT/CN2009/074282
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English (en)
French (fr)
Inventor
任晓涛
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP09815634A priority Critical patent/EP2337412A4/en
Priority to BRPI0919484A priority patent/BRPI0919484A2/pt
Publication of WO2010034265A1 publication Critical patent/WO2010034265A1/zh
Priority to US13/073,234 priority patent/US20110170510A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • 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
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, apparatus, and system for mapping an access point to a cell in a mobile communication system. Background technique
  • fourth-generation mobile communication systems can provide higher peak user throughput, average user throughput Rate and marginal user throughput give users a better data transfer experience.
  • the coordinated multi-point transmission technology plays an irreplaceable role in greatly improving the spectrum efficiency.
  • the coordinated multi-point transmission technology refers to: A plurality of access points (APs) that are geographically separated from each other provide data transmission services for one or more users at the same time.
  • the access point is a physical node that includes at least one or more antenna elements located in the same geographical location, and these antenna elements have the same large-scale fading.
  • these access points may belong to the same base station or different base stations.
  • terminal 1 passes through access point 1, access point 2, access point 3, and base station 1.
  • these access points can pass this low latency and Data sharing between the large-capacity connection and the base station, and the base station can release real-time control commands, such as interference coordination commands, resource scheduling signaling, etc., to the respective access points through such low-latency and large-capacity connections, thereby completing the downlink.
  • the access point 5 serving the terminal 3 belongs to the base station 2
  • the access point 7 and the access point 9 serving the terminal 3 belong to the base station 3, due to the limitation of the interface between the base stations (generally It is said that there is only a large delay and low capacity interface between base stations, such as X2 interface, which is represented by double solid lines in Figure 1.
  • Real-time data sharing between base stations cannot be realized. In this case, dynamic coordination is difficult to achieve.
  • static or semi-static coordinated scheduling and interference management are still feasible, such as coordinated beamforming schemes.
  • Embodiments of the present invention provide methods, apparatus, and systems for mapping an access point to a cell.
  • An embodiment of the present invention provides a method for mapping an access point to a cell, including: confirming that one access point provides services for different terminals, the different terminals are located in the same cell or different cells; and allocating multiple carriers for the access point And establishing a mapping relationship between the carrier and the cell for the access point, and mapping the access point to the same cell or the different cell by using the multiple carriers.
  • Another method for mapping an access point to a cell includes: determining that there are multiple access points serving the same terminal; assigning the same carrier to the multiple access points; A mapping relationship between the access point and the cell is established on the carrier, and different access points are mapped to the same cell by using the carrier.
  • a method for performing coordinated multipoint transmission includes: establishing a mapping relationship between an access point, a carrier, and a cell; and storing a mapping relationship between the access point, the carrier, and the cell; The mapping relationship performs coordinated multipoint transmission.
  • the mapping device for mapping an access point to a cell includes: an acknowledgment unit, configured to confirm that an access point provides services for different terminals; and an allocating unit, configured to serve the access point Allocating a plurality of carriers; a mapping relationship establishing unit, configured to map the access point to the same cell or the different cell by using the multiple carriers.
  • Another mapping device for mapping an access point to a cell includes: an acknowledgment unit, configured to confirm that there are multiple access points serving the same terminal; The multiple access points are allocated to the same carrier; the mapping relationship establishing unit is configured to establish a mapping relationship between the multiple access points and the same cell on the carrier.
  • the base station provided by the embodiment of the present invention includes: the mapping device provided by the foregoing embodiment; and a storage unit, configured to save a mapping relationship established by the mapping device.
  • An access point provided by the embodiment of the present invention includes: a unit for learning a mapping relationship between the access point, a carrier allocated to the access point, and a serving cell of the access point; and Relationship, a unit that provides services to multiple terminals through multiple carriers.
  • the communication system includes: a base station for performing wireless communication; a mapping device for establishing a mapping relationship; a storage unit for saving the mapping relationship; and a mapping relationship for saving according to the storage unit Multiple access points that coordinate coordinated multipoint transmissions.
  • the embodiments of the present invention can enable access points located in different cells to provide services for the same terminal based on the same carrier, which is equivalent to converting inter-cell coordination into intra-cell coordination, reducing signaling overhead, and reducing coordinated multi-point transmission. With the complexity of receiving.
  • FIG. 1 is a schematic diagram of a coordinated multipoint transmission system framework provided by a conventional technology
  • FIG. 2 is a schematic diagram of coordinated multi-point transmission under the same base station applied to the embodiment of the present invention
  • FIG. 3 is a schematic diagram of coordinated multi-point transmission under different base stations applied to the embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for mapping an access point to a cell in a multi-carrier system according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for mapping an access point to a cell in a multi-carrier system according to another embodiment of the present invention.
  • FIG. 6 is a flow chart showing a method for coordinating multipoint transmission in a multi-carrier system according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a mapping device for mapping an access point to a cell in a multi-carrier system according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a base station according to an embodiment of the present invention.
  • the access point 6 providing the service belongs to the cell 2, the access point 7 and the access point 8 serving the terminal 3 belong to the cell 3, and the cell 2 and the cell 3 correspond to the same base station; these different cells may also be different base stations.
  • the access points from the multiple different cells are served by one terminal, and the access points of different cells have different cell IDs, so that the downlink control channel is sent to the terminal (
  • scheduling signaling including different cell IDs, precoding matrix indications, and modulation coding indications are required, which brings more signaling overhead.
  • an access point in the prior art needs to detect an uplink signal having a base sequence of the cell to which it belongs, as illustrated by using FIG. 2 as an example, the access point 6, the access point 7 and The access point 8 is used for uplink joint reception of the terminal 3, and the access point 6 belongs to the cell 3.
  • the access point 6 needs to detect an uplink signal having a base sequence of the cell 3, and is used for receiving the terminal.
  • the complexity of the transmission/reception processing is increased, which leads to problems such as increased power consumption and increased cost.
  • an embodiment of the present invention provides a method for mapping an access point to a cell in a multi-carrier system, which is applicable not only to an OFDMA system but also to a CDMA system, a TDMA system, and Other mobile communication systems.
  • the method includes the following steps.
  • Step 402 Confirm that an access point provides services for different terminals.
  • the different terminals may be different terminals located in different cells, or may be located in the same cell. Different terminals.
  • the acknowledgment access point 6 is used to provide services for the terminal 3 and the terminal 4, wherein the terminal 3 is located in the cell 3 and the terminal 4 is located in the cell 2; or the access point 7 is confirmed to be located in the cell 3.
  • Terminal 2 and terminal 3 provide services.
  • Step 404 Assign multiple carriers to the access point.
  • the access point 6 since the access point 6 provides services for the terminal 3 and the terminal 4, respectively, the access point 6 is allocated two carriers, which are assumed to be carrier 1 and carrier 2, where carrier 1 is used to serve terminal 4, carrier 2 Used to serve terminal 3. In practical applications, if the access point 6 also provides services for terminals located in other cells (different from the cell 2 and the cell 3), it is also necessary to allocate a carrier for the access point, for example, different from carrier 1 and carrier 2. Carrier 3.
  • the access point 7 provides services for the terminal 2 and the terminal 3 located in the cell 3
  • the access point 7 is allocated two carriers, which are assumed to be the carrier 2 and the carrier 4, wherein the carrier 2 is used to serve the terminal 3, and the carrier 4 Used to serve terminal 2.
  • Step 406 Establish a mapping relationship between the carrier and the cell for the access point, so as to map the access point to the same cell or a different cell by using each allocated carrier.
  • the mapping between the carrier and the cell may include: establishing a mapping relationship between the carrier and the cell ID, as the mapping between the carrier and the cell may be performed.
  • the mapping relationship includes a mapping relationship between the IDs of the carrier 1 and the cell 2, and a mapping relationship between the IDs of the carrier 2 and the cell 3;
  • the mapping relationship includes a mapping relationship between the IDs of the carrier 2 and the cell 3, and a mapping relationship between the carriers 4 and the ID of the cell 3.
  • the method may be used to establish a channel corresponding to one cell on one carrier, where the same cell or a different cell may be specifically If the terminal is located in a different cell, the access point may be mapped to a different cell; if located in the same cell, the access point may be mapped to the same cell.
  • a correspondence corresponding to the cell 2 (or the ID of the cell 2) is established on the carrier 1.
  • Channel a channel corresponding to cell 3 (or the ID of cell 3) is established on carrier 2.
  • Cell 2 and Cell 3 For access point 6, on carrier 1, it is mapped to cell 2, and on carrier 2, it is mapped to cell 3, so that one access point 6 is mapped to two cells simultaneously.
  • the channel when a channel corresponding to a cell (or the ID of the cell) is established on one carrier, the channel may be a downlink control channel, an uplink control channel, or other types of channels, such as a broadcast channel, and synchronization. Channel, etc.
  • mapping relationship between the access point, the multiple carriers allocated to the access point, and the same cell may be further saved; or the access point is saved and allocated to the access point.
  • mapping relationship saved by the base station and the other base stations may be exchanged after the saving, for example, the mapping relationship saved by the base station is sent through the X2 interface between the base stations. To other base stations, and to receive mappings saved from other base stations.
  • Figure 4 illustrates an embodiment in which an access point is mapped to the same cell or a different cell. Since there are usually multiple access points in actual applications, there are often more than one access point serving different cells. Therefore, the mapping between the carrier and the cell is established for each access point, for example, the mapping relationship between the carrier and the cell is established for each access point. In this way, the mapping relationship between the access point, the carrier, and the cell can be established. It is not difficult for a person skilled in the art to understand that, according to the method provided in this embodiment, a situation may be allocated for allocating the same carrier to different access points. For example, in FIG. 2, the carrier 2 is allocated to the access point 6, and the carrier 2 is accessed. Point 6 corresponds to cell 3; carrier 2 is assigned carrier 2, and carrier 2 also corresponds to cell 3. Thus, for a carrier, different access points can establish a mapping relationship with the same cell (or cell ID) through the carrier.
  • the ingress points allocate a common carrier such that the access points correspond to the same cell on the common carrier. For example, in FIG. 2, it is assumed that the access point 6 has been assigned carrier 2, on the carrier 2, the access point 6 corresponds to the cell 3; since the access point 7 and the access point 6 serve the same terminal (terminal 3) When assigning a carrier to the access point 7, a carrier common to the access point 6, such as carrier 2, on carrier 2, may be allocated. Access point 7 also corresponds to cell 3.
  • the embodiment of the present invention further provides a method for mapping an access point to a cell, including If an access point provides services for different terminals, the access point is allocated a plurality of carriers, wherein the different terminals are located in the same cell or different cells; and the access point is established for the access point Mapping the plurality of carriers and the cell to map the access point to the same cell or the different cell by using the multiple carriers. After establishing a mapping relationship between a carrier and a cell for an access point, if one or more other access points provide services for different terminals, the carriers may be allocated to other access points according to substantially similar steps, and Establish mapping relationships between access points, carriers, and cells. Referring to FIG. 5, another embodiment of the present invention provides a method for mapping an access point to a cell in a multi-carrier system, the method comprising the following steps.
  • Step 502 Confirm that there are multiple access points that provide services for the same terminal.
  • the multiple access points may be located in the same cell or in at least two different cells.
  • the access point 6, the access point 7, and the access point 8 all provide services for the terminal 3, wherein the access point 6 is located in the cell 2, the access point 7 and the access point.
  • Point 8 is located in cell 3; or access point 7, access point 8 and access point 9 co-located in cell 3 provide service for terminal 2.
  • Step 504 assigning the same carrier to the access points.
  • the multi-carrier system there may be multiple carriers allocated for the access point, and the carrier 2 is selected for the access point 6, the access point 7 and the access point 8; or the access point 7 and the access point 8 are selected.
  • Carrier 4 is assigned to access point 9.
  • Step 506 Establish a mapping relationship between the multiple access points and the same cell on the carrier, so as to map different access points to the same cell by using the carrier.
  • the mapping relationship between the access point and a cell on the carrier may include: establishing, on the carrier, a channel corresponding to the cell (or cell ID) for an access point, for example, the channel may be a downlink control channel. , can also be the uplink control channel, Other types of channels such as a broadcast channel, a synchronization channel, and the like can also be used.
  • the same cell may be a cell where the terminal is located, for example, the access point 6 is mapped to the cell 3 on the carrier 2, and the access point 7 and the access point 8 are also mapped to the cell 3 on the carrier 2, also That is, the cell 3 corresponds to the carrier 2 and the access point 6, the access point 7, and the access point 8;
  • the access point 7, the access point 8 and the access point 9 are mapped to the cell 3 on the carrier 4, and the cell 3 corresponds to the access point 7, the access point 8, and the access point 9 through the carrier 4.
  • mapping relationship between the carrier, the multiple access points, and the same cell may be further saved. If the mapping relationship is saved in the base station to which the access point belongs, the mapping relationship saved by the base station and the other base stations may be exchanged after the saving, for example, the mapping relationship saved by the base station is sent through the X2 interface between the base stations. To other base stations, and to receive mappings saved from other base stations.
  • FIG. 5 illustrates an embodiment in which different access points are mapped to the same cell. Since multiple carriers can be allocated in a multi-carrier system, operations can be repeated according to the above process, and different carriers are respectively established.
  • the mapping relationship between the access point and the same cell for example, the mapping relationship between different access points and the same cell is established on each carrier in turn. It is not difficult for those skilled in the art to understand that, according to the method provided in this embodiment, a situation may be different in which different carriers are allocated for one access point, for example, in FIG. 2, on carrier 1, access point 4, access point 5, and The access point 6 corresponds to the cell 2, and on the carrier 2, the access point 6, the access point 7 and the access point 8 correspond to the cell 3, and the access point 6 is assigned carrier 1 and carrier 2.
  • the mapping relationship between the access point, the carrier, and the cell can be established.
  • the embodiment of the present invention further provides a method for mapping an access point to a cell, which specifically includes: if there are multiple access points serving a terminal, assigning the same carrier to the multiple access points; A mapping relationship between the multiple access points, the carrier, and the same cell is established on the carrier, so that the multiple access points are mapped to the same cell by using the carrier.
  • the ingress point that is, the access point serving the terminal
  • Step 602 Establish a mapping relationship between the access point, the carrier, and the cell (or the cell ID).
  • the mapping relationship may be established by: establishing an "access point to cell ID mapping table" corresponding to different carriers, as shown in the embodiment corresponding to FIG. 5; or establishing a "cell ID” corresponding to different access points.
  • the mapping table to the carrier" is as shown in the corresponding embodiment of FIG.
  • Step 604 The mapping relationship between the access point, the carrier, and the cell is saved.
  • mapping relationship needs to be further saved. If multiple cells corresponding to one access point belong to the same base station, the mapping relationship may be saved in the base station, for example, the "access point to cell ID mapping table" corresponding to different carriers and/or different connections.
  • the "cell ID to carrier mapping table” corresponding to the in point or may be “cell ID, access point and carrier mapping table”; if multiple cells corresponding to one access point belong to different base stations, Then, each base station at least saves a mapping relationship corresponding to an access point that has its own data interaction, for example, an "access point to cell ID mapping table” corresponding to different carriers and/or a corresponding access point "Cell ID to Carrier Mapping Table", in addition, these different base stations need to exchange their saved mapping relationships through inter-base station interfaces such as X2 interface or S1 interface.
  • inter-base station interfaces such as X2 interface or S1 interface.
  • Step 606 Perform coordinated multi-point transmission according to the mapping relationship.
  • a channel corresponding to the same cell for example, a downlink control channel, may be established on one access point based on different carriers, and one access point is respectively determined by different carriers. Services are provided by different terminals of the same cell.
  • a channel corresponding to a different cell for example, a downlink control channel, may be established on one access point based on different carriers, and one access point is respectively determined by different carriers. Terminals in different cells provide good services.
  • the same carrier can be allocated to the access points, so that the access points are mapped to the same cell by using the same carrier, so that the access points can use the same A carrier serves the terminal.
  • FIG. 5 For example, in FIG.
  • the access point 6, the access point 7, and the access point 8 provide services for the terminal 3, wherein the access point 6 is located in the cell 2, and the access point 7 and the access point 8 are located in the cell 3, then The access point 6, the access point 7 and the access point 8 allocate carrier 2, such that the access points serving the terminal 3 are the access point 6, the access point 7 and the access point 8 on the carrier 2, respectively.
  • the method provided by the embodiment of the present invention can enable access points located in different cells to provide services for the same terminal based on the same carrier, which is equivalent to converting inter-cell coordination into intra-cell coordination, reducing signaling overhead, and reducing The complexity of coordinating multipoint transmission and reception.
  • an embodiment of the present invention provides a mapping apparatus for mapping an access point to a cell in a multi-carrier system.
  • the mapping means includes: an acknowledgment unit 702, an allocation unit 704, and a mapping relationship establishing unit 706.
  • the acknowledgment unit 702 is configured to confirm that an access point provides services for different terminals. Taking the system shown in FIG. 2 as an example, the acknowledgment unit 702 confirms that the access point 6 provides services for the terminal 3 and the terminal 4, where the terminal 3 is located in the cell. 3, and the terminal 4 is located in the cell 2.
  • the allocating unit 704 is configured to allocate a plurality of carriers for the access point; for example, the allocating unit 704 allocates two carriers for the access point 6, which are carrier 1 and carrier 2.
  • the mapping relationship establishing unit 706 is configured to establish a mapping relationship between the carrier and the cell, and map the access point to the same cell or the different cell by using the multiple carriers.
  • the mapping relationship establishing unit 706 maps the access point to the same cell on different carriers; or when the different terminals are located in different cells, the mapping relationship establishing unit 706 is on different carriers.
  • the access points are mapped to different cells respectively.
  • the access point 6 provides services for the terminal 3 and the terminal 4, and the terminal 3 and the terminal 4 are located in the cell 3 and the cell 2, respectively.
  • the mapping relationship establishing unit 706 maps the access point 6 to the cell 2 on the carrier 1 (providing the terminal 4 Service), and mapping access point 6 to cell 3 on carrier 2 (serving terminal 3); and access point providing service for terminal 3 and terminal 2 of the same cell, mapping relationship establishing unit 706 on carrier 2
  • the access point 7 is mapped to the cell 3 (serving the terminal 3), and the access point 7 is mapped to the cell on the carrier 4. 3 (Serving Terminal 2).
  • the acknowledgment unit 702 is configured to confirm that there are multiple access points serving the same terminal; or taking the system shown in FIG. 2 as an example, the acknowledgment unit 702 confirms the access point 6, the access point 7, and the access point 8. Provide services for terminal 3.
  • the allocating unit 704 is configured to allocate the same carrier to the multiple access points; for example, the allocating unit 704 allocates the carrier 2 for the access point 6, the access point 7, and the access point 8 for the access point 6.
  • the mapping relationship establishing unit 706 is configured to establish a mapping relationship between the multiple access points and the same cell on the carrier; for example, the mapping relationship establishing unit 706 maps the access point 6 to the cell 3 on the carrier 2, and the carrier 2 The access point 7 and the access point 8 are also mapped to the cell 3.
  • an embodiment of the present invention provides a base station that is suitable for use in a multi-carrier system.
  • the base station includes: a mapping device 70 and a storage unit 72.
  • mapping device 70 in this embodiment may be used to establish a mapping relationship between an access point, a carrier, and a cell located in the multi-carrier system, as shown in FIG.
  • the storage unit 72 is configured to store a mapping relationship between the access point, the carrier, and the cell under the foregoing base station.
  • the base station may further include:
  • the interface unit 74 is configured to exchange the saved mapping relationship with another base station, send the mapping relationship saved by the storage unit 72 to another base station, and receive the mapping relationship saved by the another base station. Specifically, the interface unit 74 exchanges the respective saved mapping relationships through an inter-base station interface such as an X2 interface or an S1 interface and an interface unit in another base station.
  • an inter-base station interface such as an X2 interface or an S1 interface and an interface unit in another base station.
  • the storage unit 72 further holds the mapping relationship acquired from the other base station.
  • An embodiment of the present invention further provides an access point, where the access point may include a unit for learning a mapping relationship between the access point, a carrier allocated to the access point, and a serving cell of the access point; And means for providing services for the plurality of terminals by the plurality of carriers according to the mapping relationship.
  • the access point may further include a storage subunit, configured to save the mapping relationship, that is, the mapping relationship between the access point, the carrier allocated to the access point, and the serving cell of the access point.
  • An embodiment of the present invention further provides a multi-carrier system, where the multi-carrier system includes at least one base A station and a plurality of access points, wherein each base station covers one cell or multiple cells, and the multiple access points are located in the same cell or different cells.
  • Each of the base stations may include: mapping means for establishing a mapping relationship, the mapping apparatus establishing a mapping relationship between the access point, the carrier, and the cell located under the base station; and a storage unit for saving the mapping relationship .
  • Each of the base stations may include mapping means for establishing a mapping relationship, and each access point includes a storage subunit for storing the access point, a carrier allocated to the access point, and the access point service.
  • a mapping relationship between cells in which case a plurality of storage subunits are equivalent to implementing a function of a storage unit in a base station.
  • mapping device or the storage unit can also be independent of the base station, each of which becomes a separate entity, or the mapping device and the storage unit can be integrated.
  • a base station may be selected to establish a mapping relationship between multiple access points under the base station, carriers allocated to the multiple access points, and cells served by the multiple access points, and stored in In the base station. After the mapping relationship is established, the multiple access points perform coordinated multi-point transmission according to the mapping relationship.
  • a multi-carrier system includes a base station and a plurality of access points located in three cells covered by the base station, the base station allocates carriers for the access points, and establishes the accesses.
  • the mapping relationship between the point, the allocated carrier and the three cells including the correspondence between the access point 6, the carrier 2 and the cell 3, and the correspondence between the access point 7, the carrier 2 and the cell 3, and the like .
  • the multiple access points perform multi-point coordinated transmission according to the mapping relationship established by the base station. For example, the access point 6 and the access point 7 provide the monthly service 3 on the carrier 2 for the terminal 3 located in the cell 3 according to the corresponding relationship.
  • the embodiments of the present invention can enable access points located in different cells to provide services for the same terminal based on the same carrier, which is equivalent to converting inter-cell coordination into intra-cell coordination, less signaling overhead, and reducing coordination multiple points.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention is essentially Or a portion contributing to the prior art may be embodied in the form of a software product stored in a storage medium, including instructions for causing a device to perform the methods described in various embodiments of the present invention. .

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Description

接入点映射到小区的方法、 装置和系统 本申请要求于 2008年 9月 28日提交中国专利局、申请号为 200810216617.1 , 发明名称为"接入点映射到小区的方法、 装置和系统"的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域， 尤其涉及移动通信系统中接入点映射到小 区的方法、 装置和系统。 背景技术
作为第三代移动通信系统（例如 WCDMA系统）和后三代移动通信系统（例 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， 给予用户更佳的数据传 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， 协调多点传输 技术在大幅度提升频谱效率方面， 发挥着不可替代的作用。
协调多点传输技术是指： 地理位置上相互分离的多个接入点 （AP, Access Point )同时为一个或多个用户提供数据传输服务。 其中接入点是一个物理节点， 它至少包括一个或多个位于同一地理位置的天线单元， 并且这些天线单元具有 相同的大尺度衰落。 在系统中存在多个接入点时， 这些接入点可能隶属于同一 个基站或者不同的基站。
如图 1所示， 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， 例如终端 1通过接入点 1、 接入点 2及接入点 3和基站 1相连接， 且在每个接入点和基站之间有低时延和大容量的连接例如光纤连接的话（图 1 中用单实线表示）， 这些接入点可以通过这种低时延和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低时延和大容量的连接向各个接入点发 布实时的控制命令例如干扰协调指令、 资源调度信令等， 从而完成下行动态协 调多点联合发射和上行动态协调多点联合接收。
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， 例如为终端 3提供服务的接入点 5隶属于基站 2 , 而为终端 3提供服务的接 入点 7和接入点 9则属于基站 3 , 由于基站之间的接口的限制（一般而言基站之 间仅有大时延低容量的接口， 例如 X2接口， 图 1中用双实线表示）， 基站之间 的实时数据共享无法实现， 在这种情况下， 动态的协调难以做到， 但是静态或 者半静态的协调调度和干扰管理仍然是可行的， 比如协调波束成形方案等。
在相关的协调多点传输技术中， 由于小区边缘的用户的信号经受着较大的 大尺度衰落， 有用信号衰落严重， 且同时承受着较强的小区间干扰， 导致小区 边缘用户的数据速率较低， 为了解决这个问题， 釆用了以终端为中心的接入点 选择方法， 这样就需要进行多小区的调度协调和 /或联合数据传输。
在实现本发明过程中， 发明人发现相关技术中至少存在如下问题： 在涉及 多小区的调度协调时， 小区间调度协调比小区内调度协调需要更多的信令开销 进行支持； 而上行小区间多点联合接收也比上行小区内多点联合接收更加复杂， 导致发射 /接收处理复杂度更高， 带来功耗上升和成本增加等问题。
发明内容
本发明的实施例提供了接入点映射到小区的方法、 装置和系统。
本发明实施例提供一种接入点映射到小区的方法， 包括： 确认一个接入点 为不同终端提供服务， 所述不同终端位于同一个小区或不同小区； 为该接入点 分配多个载波； 为该接入点建立载波和小区的映射关系， 通过所述多个载波将 该接入点映射到所述同一个小区或所述不同小区。
本发明实施例提供的另一种接入点映射到小区的方法， 包括： 确认为同一 个终端提供服务的接入点有多个； 为所述多个接入点分配同一个载波； 在该载 波上建立接入点和小区的映射关系， 通过该载波将不同的接入点映射到同一个 小区。
本发明的实施例提供的一种进行协调多点传输的方法， 包括： 建立接入点、 载波以及小区之间的映射关系； 保存所述接入点、 载波以及小区之间的映射关 系； 根据所述映射关系进行协调多点传输。
本发明的实施例提供的一种将接入点映射到小区的映射装置， 包括： 确认 单元， 用于确认一个接入点为不同终端提供服务； 分配单元， 用于为该接入点 分配多个载波； 映射关系建立单元， 用于通过所述多个载波将该接入点映射到 所述同一个小区或所述不同的小区。
本发明的实施例提供的另一种将接入点映射到小区的映射装置， 包括： 确 认单元， 用于确认为同一个终端提供服务的接入点有多个； 分配单元， 用于为 所述多个接入点分配同一个载波； 映射关系建立单元， 用于在该载波上建立所 述多个接入点和同一个小区的映射关系。
本发明的实施例提供的基站， 包括： 上述实施例提供的映射装置； 以及存 储单元， 用于保存所述映射装置建立的映射关系。
本发明实施例提供的接入点， 包括： 用于获知该接入点、 分配给该接入点 的载波以及该接入点服务小区之间的映射关系的单元； 以及用于根据所述映射 关系， 通过多个载波分别为多个终端提供服务的单元。
本发明实施例提供的通信系统， 包括： 用于进行无线通信的基站； 用于建 立映射关系的映射装置； 用于保存所述映射关系的存储单元以及用于根据所述 存储单元保存的映射关系进行协调多点传输的多个接入点。
本发明实施例可以使位于不同小区的接入点基于同一个载波为同一个终端 提供服务， 相当于把小区间协调转化成了小区内协调， 减少了信令开销， 并且 降低了协调多点发射与接收的复杂度。
附图说明
图 1是传统技术提供的协调多点传输系统框架示意图；
图 2是应用于本发明实施例的同一个基站下协调多点传输示意图； 图 3是应用于本发明实施例的不同基站下协调多点传输示意图；
图 4是本发明一个实施例提供的在多载波系统中将接入点映射到小区的方 法流程示意图；
图 5是本发明另一个实施例提供的在多载波系统中将接入点映射到小区的 方法流程示意图；
图 6是本发明一个实施例给提供的在多载波系统中协调多点传输的方法流 程示意图；
图 7是本发明一个实施例提供的在多载波系统中将接入点映射到小区的映 射装置流程示意图； 图 8是本发明一个实施例提供的基站示意图。 具体实施方式 发明人对相关技术进行分析， 发现在进行多小区的调度协调和 /或联合数据 传输时， 这些不同的小区可以是同一个基站下的不同小区， 如图 2所示， 为终端 3提供服务的接入点 6属于小区 2, 为终端 3提供服务的接入点 7及接入点 8属于小 区 3 , 小区 2和小区 3对应着同一个基站； 这些不同的小区也可以是不同基站下的 不同小区， 如图 3所示， 为终端 3提供服务的接入点 6所属小区 2对应着基站 2, 而 为终端 3提供服务的接入点 7及接入点 8所属小区 3对应着基站 3。
现有技术在进行多小区的调度协调时， 来自于多个不同小区的接入点为一 个终端服务， 由于不同小区的接入点具有不同的小区 ID, 这样在下发给终端的 下行控制信道（例如， 3GPP LTE规范中的 PDCCH ) 中就需要包括不同小区 ID 的调度信令、 预编码矩阵指示以及调制编码指示等， 从而带来较多的信令开销。
而在进行上行小区间多点联合接收时， 现有技术中一个接入点需要检测具 有其所属小区基序列的上行信号， 以图 2为例进行说明， 接入点 6、 接入点 7和接 入点 8用来进行终端 3的上行联合接收， 接入点 6属于小区 3 , 为了进行终端 3的上 行联合接收， 接入点 6需要检测具有小区 3基序列的上行信号， 用来接收终端 3的 上行信号； 同时， 接入点 6也为终端 4提供服务， 接入点 6也属于小区 2, 需要检 测具有小区 2基序列的上行信号， 用来接收终端 4的上行信号， 这样导致在进行 多点联合接收时， 增加了发射 /接收处理的复杂度， 进而带来功耗上升和成本增 加等问题。
下面结合附图对本发明实施例进行详细描述。
请参阅图 4所示， 本发明的一个实施例给出了在多载波系统中将接入点映射 到小区的方法，该方法除可以用于 OFDMA系统外，也适用于 CDMA系统、 TDMA 系统及其他移动通信系统。 该方法包括如下步骤。
步骤 402, 确认一个接入点为不同终端提供服务。
所述不同终端可以是位于不同小区的不同终端， 也可以是位于同一小区的 不同终端。
为方便表达， 下面以图 2为例进行说明， 应当明白， 以图 3为例进行说明也 是可行的。 在图 2给出的系统中， 确认接入点 6用于为终端 3和终端 4提供服务， 其中终端 3位于小区 3 , 而终端 4位于小区 2; 或者确认接入点 7为位于小区 3的终 端 2和终端 3提供服务。
步骤 404, 为该接入点分配多个载波。
在图 2中， 由于接入点 6分别为终端 3和终端 4提供服务， 为接入点 6分配两个 载波， 假定是载波 1和载波 2, 其中载波 1用于为终端 4服务， 载波 2用于为终端 3 服务。 在实际应用中， 如果接入点 6还为位于其它小区 （不同于小区 2和小区 3 ) 内的终端提供服务， 那么还需要再为该接入点分配载波， 例如不同于载波 1和载 波 2的载波 3。
或者由于接入点 7为位于小区 3中的终端 2和终端 3提供服务， 为接入点 7分配 两个载波， 假定是载波 2和载波 4, 其中载波 2用于为终端 3服务， 载波 4用于为终 端 2服务。
步骤 406, 为该接入点建立载波和小区的映射关系， 以通过各分配载波将该 接入点映射到同一个小区或不同小区。
由于不同小区可以通过小区 ID相区分， 因此建立载波和小区的映射关系具 体可以包括： 建立载波和小区 ID的映射关系。 在本实施例中， 对接入点 6而言， 该映射关系包括载波 1和小区 2的 ID之间的映射关系， 以及载波 2和小区 3的 ID之 间的映射关系； 对接入点 7而言， 该映射关系包括载波 2和小区 3的 ID之间的映射 关系， 以及载波 4和小区 3的 ID之间的映射关系。
为了通过不同载波将该接入点映射到同一个小区或不同的小区， 具体可以 釆用在一个载波上建立和一个小区相对应信道的方式， 其中所述同一个小区或 不同的小区具体可以是该接入点所服务的多个终端所在小区， 若这些终端位于 不同小区， 则该接入点可以映射到不同小区； 若位于同一小区， 则该接入点可 以映射到该同一个小区。 例如为了通过载波 1和载波 2分别将接入点 6映射到两个 不同的小区， 对接入点 6, 在载波 1上建立和小区 2 (或小区 2的 ID )相对应的信 道， 在载波 2上建立和小区 3 (或小区 3的 ID )相对应的信道。 这样， 对于接入点 6, 在载波 1上， 它是映射到小区 2的， 同时， 在载波 2上， 它是映射到小区 3的， 于是， 一个接入点 6就同时映射到了两个小区 （小区 2和小区 3 ) 。
其中， 在一个载波上建立和一个小区 （或该小区的 ID )相对应的信道时， 该信道可以是下行控制信道， 也可以是上行控制信道、 还可以是其它类型的信 道例如广播信道、 同步信道等。
此外， 在步骤 406之后， 还可以进一步保存该接入点、 分配给该接入点的 多个载波和所述同一个小区的映射关系； 或者保存该接入点、 分配给该接入点 的多个载波和所述不同小区的映射关系。
如果所述映射关系保存在该接入点所属的基站， 那么在保存之后还可以交 换所述基站和其它基站各自保存的映射关系，例如通过基站之间的 X2接口将本 基站保存的映射关系发送至其它基站， 以及接收来自其它基站保存的映射关系。
图 4说明的是将一个接入点映射到同一个小区或不同小区的实施例， 由于 在实际应用中， 接入点通常有多个， 而为不同小区提供服务的接入点也往往不 止一个， 因此可以按照上述过程进行操作， 分别为每个接入点建立起载波和小 区的映射关系， 例如依次为每个接入点建立起载波和小区的映射关系。 这样就 可以建立接入点、 载波以及小区之间的映射关系。 本领域人员不难明白， 按照 本实施例提供的方法， 可能会出现为不同接入点分配相同载波的情形， 例如图 2 中， 为接入点 6分配了载波 2, 在载波 2上接入点 6对应于小区 3; 为接入点 7 分配了载波 2 , 在载波 2上接入点 7也对应于小区 3。 因而对一个载波而言， 不 同的接入点可以通过该载波和相同的小区 （或小区 ID )建立映射关系。
或者， 在为一个接入点分配载波时， 可以参照其它接入点的载波分配信息， 若有两个或更多个接入点为同一个终端提供服务， 在分配载波时， 可以为这些 接入点分配一个共同的载波， 以使得这些接入点在该共同的载波上对应于同一 个小区。 例如图 2中， 假定已经为接入点 6分配了载波 2 , 在载波 2上接入点 6对应 于小区 3; 由于接入点 7和接入点 6为同一个终端 （终端 3 )提供服务， 在为接入 点 7分配载波时， 可以分配一个与接入点 6共同的载波， 例如载波 2, 在载波 2上 接入点 7也对应于小区 3。
由于在实际应用中， 接入点通常有多个， 而为不同小区提供服务的接入点 也往往不止一个， 因此， 本发明实施例还提供一种接入点映射到小区的方法， 具体包括： 若一接入点为不同终端提供服务， 为所述接入点分配多个载波， 其 中所述不同终端位于同一个小区或不同小区； 为所述接入点建立所述接入点、 所述多个载波和小区的映射关系， 以通过所述多个载波将所述接入点映射到所 述同一个小区或所述不同小区。 在为一接入点建立起载波和小区的映射关系后， 若还有一个或多个其它接入点为不同终端提供服务， 还可以按照大致类似的步 骤为其它各个接入点分配载波， 并建立接入点、 载波和小区的映射关系。 请参阅图 5所示， 本发明的另一实施例给出了在多载波系统中将接入点映射 到小区的方法， 该方法包括如下步骤。
步骤 502, 确认为同一个终端提供服务的接入点有多个。
所述多个接入点可以位于同一个小区， 或者位于至少两个不同小区。
还是以图 2为例进行说明， 图 2中， 接入点 6、 接入点 7和接入点 8都为终端 3 提供服务， 其中接入点 6位于小区 2 , 接入点 7和接入点 8位于小区 3 ; 或者共同位 于小区 3的接入点 7、 接入点 8和接入点 9为终端 2提供服务。
步骤 504, 为这些接入点分配同一个载波。
在多载波系统中， 可以为接入点分配的载波有多个， 选择为接入点 6、 接入 点 7和接入点 8分配载波 2; 或者选择为接入点 7、 接入点 8和接入点 9分配载波 4。
步骤 506, 在该载波上建立所述多个接入点和同一个小区的映射关系， 以通 过该载波将不同的接入点映射到同一个小区。
先在该载波上建立一个接入点和一个小区的映射关系， 然后分别建立各接 入点和该小区的映射关系， 例如依次操作， 直至在该载波上建立起所有为该终 端提供服务的接入点和该小区的映射关系。 在该载波上建立一个接入点和该小 区的映射关系具体可以包括： 在该载波上为一个接入点建立和该小区 （或小区 ID )相对应的信道， 例如该信道可以是下行控制信道， 也可以是上行控制信道、 还可以是其它类型的信道例如广播信道、 同步信道等。
具体地， 所述同一个小区可以是该终端所在小区， 例如接入点 6在载波 2上 映射到小区 3 , 同样接入点 7和接入点 8也在载波 2上映射到小区 3 , 也就是说小区 3通过载波 2和接入点 6、 接入点 7和接入点 8相对应；
或者接入点 7、 接入点 8和接入点 9在载波 4上映射到小区 3 , 小区 3通过载波 4 和接入点 7、 接入点 8和接入点 9相对应。
此外， 在步骤 506之后， 还可以进一步保存该载波、 所述多个接入点以及 所述同一个小区的映射关系。 如果所述映射关系保存在该接入点所属的基站， 那么在保存之后还可以交换所述基站和其它基站各自保存的映射关系， 例如通 过基站之间的 X2接口将本基站保存的映射关系发送至其它基站，以及接收来自 其它基站保存的映射关系。
图 5说明的是将不同接入点映射到同一个小区的实施例， 由于在多载波系 统中， 可以分配的载波为多个， 因此可以按照上述过程重复操作， 分别在每个 载波上建立不同接入点和同一个小区的映射关系， 例如依次在每个载波上建立 不同接入点和同一个小区的映射关系。 本领域人员不难明白， 按照本实施例提 供的方法， 可能会出现为一个接入点分配不同载波的情形， 例如在图 2中， 在 载波 1上， 接入点 4、 接入点 5和接入点 6对应于小区 2, 而在载波 2上， 接入 点 6、 接入点 7和接入点 8对应于小区 3 , 对接入点 6而言分配了载波 1和载波 2。 通过上述操作， 就可以建立接入点、 载波以及小区之间的映射关系。
此外， 本发明实施例还提供一种接入点映射到小区的方法， 具体包括： 若 为一终端提供服务的接入点有多个， 为所述多个接入点分配同一个载波； 在该 载波上建立所述多个接入点、 所述载波和同一个小区的映射关系， 以通过所述 载波将所述多个接入点映射到所述同一个小区。 在为一终端通过一个载波建立 起接入点和小区的映射关系后， 若还有一个或多个其它终端接收多个接入点提 供服务， 还可以按照大致类似的步骤为其它终端对应的接入点 （即为终端提供 服务的接入点）分配载波， 并建立接入点、 载波和小区的映射关系。 请参阅图 6所示， 本发明的一个实施例给出了在多载波系统中协调多, 传输 的方法， 该方法包括如下步骤。
步骤 602, 建立接入点、 载波以及小区 （或小区 ID )之间映射关系。
映射关系建立的方式可以是： 建立不同的载波所对应的 "接入点到小区 ID 的映射表" ， 如图 5对应的实施例所示； 或者是建立不同接入点所对应的 "小区 ID到载波的映射表" , 如图 4对应的实施例所示。
步骤 604, 保存接入点、 载波以及小区之间的映射关系。
在通过上面给出的方式完成接入点、 载波以及小区之间映射关系的建立后， 还需要进一步保存该映射关系。 如果和一个接入点对应的多个小区属于同一个 基站， 可以选择在该基站中保存该映射关系， 例如不同的载波所对应的 "接入 点到小区 ID的映射表" 和 /或不同接入点所对应的 "小区 ID到载波的映射表" ， 或者也可以是 "小区 ID、 接入点和载波间的映射表" ； 如果和一个接入点对应 的多个小区属于不同的基站， 那么， 每个基站至少保存和自己存在数据交互的 接入点所对应的映射关系， 例如不同的载波所对应的 "接入点到小区 ID的映射 表" 和 /或不同接入点所对应的 "小区 ID到载波的映射表" ， 此外这些不同基站 之间还需要通过基站间接口例如 X2接口或者 S1接口等交换各自保存的映射关 系。
步骤 606, 根据映射关系进行协调多点传输。
根据接入点、 载波以及小区之间的映射关系， 可以在一个接入点上基于不 同的载波建立和同一个小区相对应的信道例如下行控制信道， 实现一个接入点 通过不同的载波分别为同一个小区的不同终端提供服务。
根据接入点、 载波以及小区之间的映射关系， 也可以在一个接入点上基于 不同的载波建立和不同小区相对应的信道例如下行控制信道， 实现一个接入点 通过不同的载波分别为不同小区的终端提供 Λ良务。
需要指出的是， 对为同一个终端提供服务的多个接入点而言， 无论这些接 入点位于同一个小区还是位于至少两个不同的小区， 釆用图 4对应实施例提供的 方式或图 5对应实施例提供的方式， 均能实现为这些接入点分配同一个载波， 从 而通过该同一个载波将这些接入点映射到同一个小区， 以使这些接入点可以利 用同一个载波对该终端提供服务。 例如图 2中， 接入点 6、 接入点 7和接入点 8为 终端 3提供服务， 其中接入点 6位于小区 2 , 接入点 7和接入点 8位于小区 3 , 那么 可以为接入点 6、 接入点 7和接入点 8分配载波 2 , 这样为终端 3提供服务的接入点 分别是载波 2上的接入点 6、 接入点 7和接入点 8。
应用本发明实施例提供的方法， 可以使位于不同小区的接入点基于同一个 载波为同一个终端提供服务， 相当于把小区间协调转化成了小区内协调， 减少 了信令开销， 并且降低了协调多点发射与接收的复杂度。
请参阅图 7所示， 本发明的一实施例给出了在多载波系统中将接入点映射到 小区的映射装置。 该映射装置包括： 确认单元 702、 分配单元 704以及映射关系 建立单元 706。
其中确认单元 702用于确认一个接入点为不同终端提供服务； 以图 2所示的 系统为例， 确认单元 702确认出接入点 6为终端 3和终端 4提供服务， 其中终端 3位 于小区 3 , 而终端 4位于小区 2。
分配单元 704用于为该接入点分配多个载波； 例如分配单元 704为接入点 6分 配两个载波， 分别是载波 1和载波 2。
映射关系建立单元 706用于建立载波和小区的映射关系， 通过所述多个载波 将该接入点映射到所述同一个小区或所述不同的小区。
在所述不同终端位于同一个小区时， 映射关系建立单元 706在不同载波上将 该接入点映射到同一个小区； 或者在所述不同终端位于不同小区时， 映射关系 建立单元 706在不同载波上分别将该接入点映射到不同小区。
例如接入点 6为终端 3和终端 4提供服务， 终端 3和终端 4分别位于小区 3和小 区 2 , 映射关系建立单元 706在载波 1上将接入点 6映射到小区 2 (为终端 4提供服 务） ， 以及在载波 2上将接入点 6映射到小区 3 (为终端 3提供服务） ； 而接入点 为同一个小区的终端 3和终端 2提供服务， 映射关系建立单元 706在载波 2上将接 入点 7映射到小区 3 (为终端 3提供服务） ， 以及在载波 4上将接入点 7映射到小区 3 (为终端 2提供服务） 。
或者在另一个可选的实施例中，
确认单元 702用于确认为同一个终端提供服务的接入点有多个； 还是以图 2 所示的系统为例， 确认单元 702确认出接入点 6、 接入点 7和接入点 8为终端 3提供 服务。
分配单元 704用于为所述多个接入点分配同一个载波； 例如分配单元 704为 接入点 6为接入点 6、 接入点 7和接入点 8分配载波 2。
映射关系建立单元 706用于在该载波上建立所述多个接入点和同一个小区 的映射关系； 例如映射关系建立单元 706在载波 2上将接入点 6映射到小区 3 , 以 及在载波 2将接入点 7和接入点 8也映射到小区 3。
请参阅图 8所示， 本发明的一个实施例给出了一种基站， 该基站适用于多载 波系统。 该基站包括： 映射装置 70以及存储单元 72。
本实施例中映射装置 70的实现方式可以如图 7所示， 用于在多载波系统中建 立位于该基站下的接入点、 载波以及小区之间的映射关系。
存储单元 72用于保存上述基站下的接入点、 载波以及小区之间的映射关系。 此外该基站还可以进一步包括：
接口单元 74 , 用于和另一个基站交换各自保存的映射关系， 将存储单元 72 保存的映射关系发送给另一个基站， 以及接收所述另一个基站保存的映射关系。 具体地， 接口单元 74通过基站间接口例如 X2接口或者 S1接口和另一个基站中的 接口单元交换各自保存的映射关系。
存储单元 72进一步保存从所述另一个基站获取的映射关系。
本发明实施例还提供了一种接入点， 该接入点可以包括用于获知该接入点、 分配给该接入点的载波以及该接入点服务小区之间的映射关系的单元； 以及用 于根据所述映射关系， 通过多个载波分别为多个终端提供服务的单元。
进一步地， 该接入点还可以包括存储子单元， 用于保存所述映射关系即该 接入点、 分配给该接入点的载波以及该接入点服务小区之间的映射关系。
本发明实施例还提供了一种多载波系统， 所述多载波系统包括至少一个基 站和多个接入点， 其中每个基站覆盖一个小区或者多个小区， 这些多个接入点 位于同一个小区或不同的小区。
其中每个基站可以包括： 用于建立映射关系的映射装置， 所述映射装置建 立位于该基站下的接入点、 载波以及小区之间的映射关系； 以及用于保存所述 映射关系的存储单元。 或者
其中每个基站可以包括用于建立映射关系的映射装置， 而每个接入点则包 括有存储子单元， 用于保存该接入点、 分配给该接入点的载波以及该接入点服 务小区之间的映射关系， 这时多个存储子单元相当于实现了基站中存储单元的 功能。
不难明白， 该映射装置或存储单元也可以独立于基站之外， 各自成为一个单 独的实体， 或者该映射装置和存储单元也可以集成在一起。
在具体实现时， 可以选择一个基站建立该基站下多个接入点、 分配给所述 多个接入点的载波以及所述多个接入点所服务小区之间的映射关系， 并保存在 该基站中。 映射关系建立完成后， 所述多个接入点按照该映射关系进行协调多 点传输。
例如在图 2中， 多载波系统包括一个基站和多个接入点， 这些接入点位于该 基站所覆盖的三个小区内， 该基站为这些接入点分配载波， 并建立起这些接入 点、 分配的载波和这三个小区之间的映射关系， 包括接入点 6、 载波 2和小区 3之 间的对应关系， 以及接入点 7、 载波 2和小区 3之间的对应关系等。 所述多个接入 点按照基站建立的映射关系进行多点协调传输， 例如接入点 6和接入点 7根据该 对应关系在载波 2上为位于小区 3内的终端 3提供月良务。
本发明实施例可以使位于不同小区的接入点基于同一个载波为同一个终端 提供服务， 相当于把小区间协调转化成了小区内协调， 较少了信令开销， 并且 降低了协调多点发射与接收的复杂度。
通过以上的实施方式的描述， 本领域的技术人员可以清楚地了解到本发明 可借助软件加必需的通用硬件平台的方式来实现， 当然也可以通过硬件， 但很 多情况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方案本质上 或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来， 该计算机 软件产品存储在一个存储介质中， 包括若干指令用以使得一台设备执行本发明 各个实施例所述的方法。
以上公开的仅为本发明的几个具体实施例， 但是， 本发明并非局限于此， 任何本领域的技术人员能思之的变化都应落入本发明的保护范围。

Claims

权 利 要求 书
1、 一种接入点映射到小区的方法， 其特征在于， 包括：
若一接入点为不同终端提供服务， 为所述接入点分配多个载波， 其中， 所 述不同终端位于同一个小区或不同小区；
为所述接入点建立所述接入点、 所述多个载波和小区的映射关系， 以通过 所述多个载波将所述接入点映射到所述同一个小区或所述不同小区。
2、 如权利要求 1所述的方法， 其特征在于， 所述建立所述接入点、 所述多 个载波和小区的映射关系具体包括： 建立载波和小区 ID的映射关系。
3、 如权利要求 2所述的方法， 其特征在于， 所述建立载波和小区 ID的映 射关系具体包括： 在载波上建立和小区 ID相对应的信道。
4、 如权利要求 3所述的方法， 其特征在于， 所述信道为下行控制信道， 或 上行控制信道， 或广播信道， 或同步信道。
5、 如权利要求 1至 4中任一项所述的方法， 其特征在于， 还包括： 若还有一个或多个其它接入点为不同终端提供服务， 为所述一个或多个其 它接入点分配载波， 并建立接入点、 载波和小区的映射关系。
6、 如权利要求 1所述的方法， 其特征在于， 还包括： 保存所述接入点、 分 配给所述接入点的多个载波和所述同一个小区的映射关系； 或
保存所述接入点、 分配给所述接入点的多个载波和所述不同小区的映射关 系。
7、 如权利要求 6中所述的方法， 其特征在于， 所述映射关系保存在该接入 点所属的基站， 所述方法还包括：
交换所述基站和另一基站各自保存的映射关系。
8、 一种接入点映射到小区的方法， 其特征在于， 包括：
若为一终端提供服务的接入点有多个， 为所述多个接入点分配同一个载波； 在该载波上建立所述多个接入点、 所述载波和同一个小区的映射关系， 以 通过所述载波将所述多个接入点映射到所述同一个小区。
9、 如权利要求 8所述的方法， 其特征在于， 所述在该载波上建立多个接入 点、 载波和同一个小区的映射关系具体包括： 在该载波上为所述多个接入点建 立和该小区 ID相对应的信道。
10、 如权利要求 8或 9所述的方法， 其特征在于， 所述同一个小区为所述 终端所在小区。
11、 如权利要求 8或 9所述的方法， 其特征在于， 还包括：
若还有一个或多个其它终端接收多个接入点提供服务， 为所述一个或多个 终端分配载波， 并建立接入点、 载波和小区的映射关系。
12、 如权利要求 8所述的方法， 其特征在于， 还包括：
保存所述同一个载波、 所述多个接入点以及所述同一个小区的映射关系。
13、 一种进行协调多点传输的方法， 其特征在于， 包括：
根据权利要求 8至 12中任意一项所述的方法建立接入点、 载波以及小区之 间的映射关系；
根据所述映射关系进行协调多点传输。
14、 一种将接入点映射到小区的映射装置， 其特征在于， 包括：
确认单元， 用于确认一个接入点为不同终端提供服务， 所述不同终端位于 同一个小区或不同小区；
分配单元， 用于为该接入点分配多个载波；
映射关系建立单元， 用于通过所述多个载波将该接入点映射到所述同一个 小区或所述不同的小区。
15、 如权利要求 14所述的映射装置， 其特征在于：
在所述不同终端位于同一个小区时， 所述映射关系建立单元通过所述多个 载波将该接入点映射到同一个小区； 或者
在所述不同终端位于不同小区时， 所述映射关系建立单元通过所述多个载 波将该接入点映射到不同小区。
16、 一种将接入点映射到小区的映射装置， 其特征在于， 包括：
确认单元， 用于确认为同一个终端提供服务的接入点有多个；
分配单元， 用于为所述多个接入点分配同一个载波； 映射关系建立单元， 用于在该载波上建立所述多个接入点和同一个小区的 映射关系。
17、 一种基站， 其特征在于， 包括：
如权利要求 14至 16中任一项所述的映射装置； 以及
存储单元， 用于保存所述映射装置建立的映射关系。
18、 如权利要求 17所述的基站， 其特征在于， 所述映射关系具体包括： 位 于所述基站下的接入点、 载波以及小区之间的映射关系。
19、 如权利要求 17或 18所述的基站， 其特征在于， 还包括：
接口单元， 用于将所述存储单元保存的映射关系发送给另一个基站， 以及 接收所述另一个基站保存的映射关系。
20、 一种接入点， 其特征在于， 包括：
用于获知该接入点、 分配给该接入点的载波以及该接入点服务小区之间的 映射关系的单元； 以及
用于才艮据所述映射关系， 通过多个载波分别为多个终端提供 Λ良务的单元。
21、 如权利要求 20所述的接入点， 其特征在于， 还包括：
用于保存所述映射关系的存储子单元。
22、 一种通信系统， 其特征在于， 包括：
用于进行无线通信的基站；
用于建立映射关系的映射装置；
用于保存所述映射关系的存储单元； 以及
用于根据所述存储单元保存的映射关系进行协调多点传输的多个接入点。
23、 如权利要求 22所述的通信系统， 其特征在于，
所述映射装置及所述存储单元集成在所述基站中。
24、 如权利要求 22所述的通信系统， 其特征在于，
所述存储单元包括， 每个接入点集成有所述多个存储子单元中的一个存储 子单元； 所述映射装置集成在所述基站中。
PCT/CN2009/074282 2008-09-28 2009-09-28 接入点映射到小区的方法、装置和系统 WO2010034265A1 (zh)

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US20110170510A1 (en) 2011-07-14
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