WO2010133034A1 - Procédé pour une communication multipoint coordonnée et dispositif correspondant - Google Patents

Procédé pour une communication multipoint coordonnée et dispositif correspondant Download PDF

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Publication number
WO2010133034A1
WO2010133034A1 PCT/CN2009/071902 CN2009071902W WO2010133034A1 WO 2010133034 A1 WO2010133034 A1 WO 2010133034A1 CN 2009071902 W CN2009071902 W CN 2009071902W WO 2010133034 A1 WO2010133034 A1 WO 2010133034A1
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WO
WIPO (PCT)
Prior art keywords
special
channel
special subframe
user
subframe
Prior art date
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PCT/CN2009/071902
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English (en)
Chinese (zh)
Inventor
曲秉玉
万蕾
任晓涛
闫志宇
白伟
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
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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 PCT/CN2009/071902 priority Critical patent/WO2010133034A1/fr
Priority to CN200980124701.3A priority patent/CN102084672B/zh
Publication of WO2010133034A1 publication Critical patent/WO2010133034A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • 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
    • H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for coordinating multipoint communication.
  • the research direction of mobile communication systems is to provide higher peak user throughput, average user throughput and edge user throughput, giving users a better data transmission experience.
  • the CoMP (Coordinated Multi Point Transmission and Reception) technology is applied in the new generation of mobile communication systems.
  • the CoMP technology mainly utilizes multiple access points (Access Points) that are geographically separated from each other and one or more at the same time. Users provide services to increase user data reception gain. CoMP technology helps to greatly increase spectrum utilization efficiency.
  • FIG. 1 shows a topology architecture of a coordinated multipoint communication system, in which an access point 1, an access point 2, and an access point 3 provide services for the terminal 1; Incoming point 5 and access point 6 provide services for terminal 2; access point 5, access point 7 and access point 9 provide services for terminal 3; access point 7, access point 8 and access point 9 are terminals 4 provide services.
  • Access point 1, access point 2 and access point 3 belong to base station 1; access point 4, access point 5 and access point 6 belong to base station 2; access point 7, access point 8 and access Point 9 is attributed to base station 3.
  • a plurality of access points serving the same terminal may belong to the same base station or may belong to different base stations.
  • the access point transmits and receives data under the control of the base station to which it belongs.
  • One or more access points may be included in a single cell.
  • the user tube that accepts the coordinated multi-point transmission service is called a CoMP user
  • the user tube that does not accept the coordinated multi-point transmission service is called a non-CoMP user.
  • the network side usually uses the same channel to provide services for CoMP users and non-CoMP users. In this way, specific functions and performance optimizations for CoMP services may not be completed.
  • the technical problem to be solved by the embodiments of the present invention is to provide a method and device for coordinating multipoint communication, which is beneficial to complete specific functions and performance optimization for CoMP services.
  • a method for coordinating multipoint communication comprising: scheduling downlink data of a user receiving a coordinated multipoint transmission service to a special channel of a special subframe, the special channel of the special subframe serving as a dedicated channel for accepting a coordinated multipoint transmission service user ; Send the special subframe.
  • a method for coordinating multipoint communication comprising: receiving downlink data carried by a special channel of a special subframe, the special channel of the special subframe serving as a dedicated channel for accepting a coordinated multipoint transmission service user; Downlink data carried by a special channel of a special subframe.
  • An access network device comprising: a data scheduling module, configured to schedule downlink data received by a coordinated multipoint transmission service user to a special channel of a special subframe, and the special channel of the special subframe serves as an accepted coordinated multipoint transmission service a dedicated channel of the user; a sending module, configured to send the special subframe.
  • a terminal comprising: a first receiving module, configured to receive downlink data carried by a special channel of a special subframe, where a special channel of the special subframe is a dedicated channel that accepts a coordinated multipoint transmission service user; a demodulation processing module, And used for demodulating and processing downlink data carried by a special channel of the special subframe received by the first receiving module.
  • the network side treats the CoMP user and the non-CoMP user differently, and uses the dedicated channel opened for the CoMP user in the specific structure subframe to carry the CoMP user.
  • Downstream data facilitates the completion of specific functions and performance optimizations for CoMP services.
  • FIG. 1 is a schematic diagram of a topology of a coordinated multipoint communication system provided by the prior art
  • FIG. 2 is a flowchart of a method for coordinating multipoint communication according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for coordinating multipoint communication according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a normal subframe according to Embodiment 2 of the present invention.
  • 4b is a schematic structural diagram of a special subframe according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of another special subframe according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of another special subframe according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic structural diagram of another special subframe according to Embodiment 2 of the present invention
  • FIG. 5 is a schematic diagram of a cell combination according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic structural diagram of an access network device according to Embodiment 4 of the present invention.
  • FIG. 7 is a schematic structural diagram of a terminal according to Embodiment 5 of the present invention.
  • a method and a device for coordinating multipoint communication are provided.
  • the network side treats the CoMP user and the non-CoMP user differently, and uses the dedicated channel opened for the CoMP user in the specific structure subframe to carry the downlink of the CoMP user. Data, which facilitates the completion of specific functions and performance optimizations for CoMP services.
  • a method for coordinating multipoint communication according to Embodiment 1 of the present invention may include:
  • the downlink data that is received by the coordinated multi-point transmission service user is scheduled to a special channel of the special subframe, and the special channel of the special subframe is used as a dedicated channel for accepting the coordinated multi-point transmission service user.
  • the special subframe in the radio frame includes a special channel that can serve as a dedicated channel for accepting coordinated multi-point transmission service users.
  • the special subframe may also include one or more types that can be shared by various types of users.
  • the present invention is not limited to the normal control channel and the physical downlink shared channel (PDSCH).
  • the various downlink data (e.g., control information, service data, or other information) of the CoMP user can be scheduled to a special channel of the special subframe.
  • control information e.g., service data, or other information
  • service data e.g., service data, or other information
  • the special subframe further includes one or more common control channels that can be shared by various types of users
  • the control information of the non-CoMP users can also be scheduled to one or more common control channels of the special subframe.
  • the special subframe further includes a PDSCH that can be shared by various types of users
  • the downlink data of the CoMP user and/or the non-CoMP user can also be scheduled to the PDSCH of the special subframe.
  • the normal subframe can also be sent.
  • the normal subframe and the special subframe can be sent in multiple multiplexing manners.
  • the special subframe and the normal subframe are transmitted by time division multiplexing or by frequency division multiplexing.
  • the manner of transmitting or the like is not limited in the present invention.
  • the access network device may be a base station, a base station controller, an access point, or another device having similar functions in the communication system, and the like, which is not limited by the present invention.
  • the user terminal or other device can receive the special subframes sent by the network side in a diversity manner, obtain the downlink data carried by the special channel of the special subframe, and obtain the diversity receiving gain of the downlink data carried by the special channel.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-A
  • upgrade system thereof
  • a method for coordinating multipoint communication according to Embodiment 2 of the present invention may include :
  • the base station determines a configuration configuration of a special subframe and a normal subframe in the radio frame.
  • a radio frame includes multiple sub-frames.
  • the base station on the network side can first determine the ratio of the normal sub-frame to the special sub-frame in the radio frame according to its own load, the throughput rate of the cell edge user, and the like. Configuration situation.
  • a radio frame includes a total of N subframes, and the ratio configuration of the normal subframe and the special subframe determined by the base station may be: nl:n2, where n1 represents a normal subframe in a radio frame.
  • the base station can configure the location distribution of the special subframe in the radio frame in multiple ways.
  • the base station can periodically configure a special subframe.
  • the periodic configuration means that the special subframe periodically appears in the radio frame.
  • the base station can be configured every n normal subframes.
  • a special subframe, the number of normal subframes separated by two adjacent special subframes is the same.
  • the base station may perform aperiodic configuration on the special subframe.
  • the so-called aperiodic configuration refers to the non-periodic appearance of the special subframe in the radio frame.
  • the base station may configure one or more subframes of a specific sequence number (system subframe number) in the radio frame as a special subframe, and the number of normal subframes separated by two adjacent special subframes is incomplete. the same.
  • the base station may further notify the terminal of the configuration of the normal subframe and the special subframe in the radio frame by using control signaling or other messages.
  • the base station may carry the subframe configuration information in the control signaling and send the information to the terminal a.
  • the foregoing subframe configuration information may indicate the configuration of the special subframe in the radio frame.
  • the terminal a After receiving the control signaling carrying the subframe configuration information, the terminal a can learn which subframes in the subframes of the radio frame are special subframes, which subframes are normal subframes, and can be matched according to the known subframes. More than configured to receive normal and special subframes.
  • the base station may also pre-arrange the ratio configuration of the normal subframe and the special subframe in the radio frame with the terminal, and then the base station and the terminal may send and receive the normal subframe according to the agreed ratio configuration. Special subframe.
  • the base station can control the access point to transmit the special subframe and the normal subframe in multiple multiplexing manners.
  • the base station uses the time division multiplexing method to send the special subframe and the normal subframe as an example for description.
  • the structures of the normal subframe and the special subframe are different.
  • the structure of the normal subframe can be as shown in Figure 4-a.
  • the normal subframe includes a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH) that can be shared by various types of users.
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the special subframe may include a special channel (for convenience of description, the following is called channel A), and may of course include one or more common control channels that can be shared by various types of users (for convenience of description, one of the common control channels below)
  • channel B The cartridge is called channel B), PDSCH, etc., and the present invention is not limited.
  • channel A of a special subframe may be used as a dedicated channel of a CoMP user, and channel A of a special subframe may be dedicated to carrying downlink data of a CoMP user.
  • the channel B of the special subframe can be used as the control channel of the non-CoMP user, and the channel B of the special subframe is mainly used for carrying the control information of the non-CoMP user.
  • the PDSCH that can also be included in the special subframe can be used to carry service data of CoMP users and/or non-CoMP users, etc., to ensure backward compatibility.
  • the main difference between the normal subframe and the special subframe structure is that the normal subframe does not include the channel A, and the special subframe includes the channel A.
  • the structure of the special subframe may be as shown in FIG. 4-b, FIG. 4-c, FIG. 4-d or FIG. 4-e, but is not limited thereto.
  • the frequency span of channel A of the special subframe may be the entire frequency band of the special subframe. That is, the channel A of the special subframe can occupy all the frequency bands of the special subframe.
  • the frequency span of channel A of a special subframe may be a partial frequency band of a special subframe, that is, the channel A of the special subframe may occupy a part of the special subframe. Frequency band.
  • the channel A and PDSCH of the special subframe coexist in the special subframe in the form of frequency division multiplexing.
  • the time span of the common channel A of the special subframe may be part of the time in the special subframe except the time occupied by the channel B, that is, the channel of the special subframe.
  • A can occupy part of the time in the special subframe to remove the time occupied by channel B.
  • the time span of the channel A of the special subframe may also be the total time of the time taken to remove the channel B in the special subframe, that is, the channel A of the special subframe may occupy the special subframe and remove the channel B. The total time taken.
  • the base station can also determine the normal subframe and the special subframe ratio configuration in the radio frame according to the load of the cell, the throughput rate of the cell edge user, and the like, but configure the device in a default manner, for example, wirelessly.
  • the subframes of the frame are all configured as special subframes, or the default is other configurations.
  • the base station schedules downlink data of terminal a to channel A of the special subframe.
  • a base station can govern one or more access points, and the access point typically transmits and receives data under the control of its home base station.
  • Coordinating multipoint transmission usually requires simultaneous coordination of multiple access points. Before coordinating multipoint transmission to terminal a, one or more base stations may first select the access point set that provides data transmission service for terminal a through negotiation. .
  • the base station may select a service that provides service for the terminal a from the candidate access point set according to the channel state information (CSI, Channel State Information) between the access point and the candidate access point set.
  • CSI Channel State Information
  • the set of access points that provide services for terminal a may be negotiated by a plurality of base stations serving the terminal a.
  • the configuration of the normal subframes and the special subframes in the wireless frames of the plurality of base stations serving the terminal a is the same.
  • the base station can perform allocation scheduling of transmission resources of the terminal, and the transmission resource refers to time-frequency resources occupied by the transmission data.
  • the resource scheduling information is mainly used to indicate the bit of the transmission resource allocated by the base station to the terminal.
  • the location of the transmission resource is usually referred to as a time location and/or a frequency location.
  • the multiple base stations to which the access point set belongs may be negotiated to allocate the same service data for the terminal a. Transfer resources.
  • control information can include various control signaling and other information
  • the base station can carry resource scheduling information in the control signaling, and use the control signaling to notify the terminal of the location of the transmission resource allocated for the terminal.
  • the base station may retrieve the control information of the terminal a to the channel A of the special subframe, and may also schedule the user data or other information of the terminal a to the channel A of the special subframe. For example, the base station only schedules the control information of the terminal a to the channel A of the special subframe as an example.
  • the base station also adjusts the control signaling carrying the resource scheduling information of the terminal a to the channel A of the special subframe.
  • the base station may also schedule the dedicated reference signal of the channel A to the channel A, and the dedicated reference signal of the channel A is beneficial for the terminal to demodulate and process the downlink data carried by the channel A.
  • the transmission resources occupied by the dedicated reference signals carried by the channel A may be distributed in the transmission resources occupied by the channel A.
  • the base station schedules control information of the non-CoMP user to the channel B of the special subframe.
  • the base station may also schedule the control information of the non-CoMP user to the channel B of the special subframe, and may implement the CoMP user and the non-CoMP by using two different channels respectively. User control information. If the special subframe further includes the PDSCH, the base station may also schedule the service data of the terminal a and the service data of the non-CoMP user to the PDSCH 0 of the special subframe.
  • Step 303 may be performed before step 302 or concurrently with step 302.
  • the base station sends a special subframe.
  • the base station can control a set of access points that simultaneously provide data transmission services for terminal a, and simultaneously transmit special subframes.
  • the terminal a can receive the downlink data carried by the channel A of the special subframe. If the channel A of the special subframe carries various control signalings (including: control signaling carrying the resource scheduling information), the terminal a can obtain the control signaling. Diversity receive gain.
  • the terminal a can obtain the location of the allocated transmission resource by the base station by parsing the resource scheduling information, and the terminal a can receive the service data at the location diversity indicated by the resource scheduling information to obtain the diversity reception gain of the service data.
  • Non-CoMP user terminals may obtain resource scheduling information and the like by receiving control signaling carried by channel B of the special subframe, and may receive data at a location indicated by the resource scheduling information.
  • the base station may send a special subframe and a normal subframe in a time division multiplexing or a frequency division multiplexing manner, and the normal subframe may carry downlink data of various users.
  • the base station controls the access point set to send the special subframe and the normal subframe, and the terminal as the receiving device receives the special subframe and/or the normal subframe as an example.
  • the access point set that provides the data transmission service for the same user can negotiate and send the special subframe and the normal subframe to complete the specific function and performance optimization for the CoMP service.
  • the special subframe and/or the normal subframe transmitting device may also be a relay device, and the receiving device of the special subframe and/or the normal subframe may also be a relay device or other device.
  • the network side treats the CoMP user and the non-CoMP user differently, and uses the dedicated channel opened for the CoMP user in the specific structure subframe to carry the downlink data of the CoMP user, which is beneficial to complete the specific for the CoMP service. Functional and performance optimization, etc.
  • multiple access points that provide services for the same user terminal can simultaneously transmit special structure subframes, and can use the dedicated channel opened for the CoMP user in the specific structure subframe to carry the control information of the CoMP user, and the CoMP user terminal can implement The diversity receives the control information carried by the CoMP user's dedicated channel, and the reception reliability of the control information is relatively improved.
  • the third embodiment of the present invention further provides a method for channel measurement.
  • Coordinating multipoint transmission requires multiple access points to coordinate work at the same time.
  • Multiple access points that provide data transmission services for terminal a at the same time may be located in multiple cells.
  • the following is a description of a plurality of access points that provide services for the terminal a, as in the case of the cell 1, the cell 2, and the cell 3 shown in FIG.
  • Cell 1, Cell 2, and Cell 3 are single cells, and Virtual Cell 4 includes Cell 1, Cell 2, and Cell 3. Of course, other cells may also be included.
  • This example uses Virtual Cell 4. Only the cell 1, the cell 2, and the cell 3 that simultaneously serve the terminal a will be described as an example.
  • Cell 1, cell 2, and cell 3 may be referred to as coordinated cells, and virtual cell 4 may be referred to as a coordinated cell set. All cells in the virtual cell 4 provide services for one user at the same time.
  • the terminal a When the cell 1, the cell 2, and the cell 3 provide the service for the terminal a, the terminal a can be regarded as currently camping on the virtual cell 4, and the access point in the virtual cell 4 provides the service.
  • the access point serving the terminal a in the cell 1, the cell 2, and the cell 3 can simultaneously transmit the control information of the terminal a by using the common channel A of the special subframe, and the terminal a can receive the above-mentioned access points in a diversity manner and use the special subframe at the same time.
  • the control information sent by channel A obtains the control information diversity reception gain.
  • the network side can use the channel A of the special subframe to carry the dedicated reference signal of the channel, and the dedicated reference signal carried by the channel A is occupied.
  • the transmission resources can be evenly distributed in the transmission resources occupied by the common channel A.
  • the terminal a diversity receives the channel A bearer-specific reference signal of the special subframe, and demodulates and processes the control information of the CoMP user carried by the channel A of the special subframe by using the dedicated reference signal received by the diversity. data.
  • the terminal After camping in a certain cell, the terminal measures the downlink channel quality of the cell in which it resides and the cell in the vicinity, periodically or under the trigger of the measurement condition.
  • the terminal a can measure the downlink channel quality of the virtual cell 4 while measuring the downlink channel quality of the cell 1, the cell 2, and the cell 3.
  • Each cell may correspond to a reference signal.
  • the special subframe includes channel B
  • the reference signals of channel B of the special subframe transmitted by cell 1, cell 2, and cell 3 correspond to cell 1, cell 2, and cell 3, respectively.
  • the access points of cell 1, cell 2, and cell 3 all transmit special subframes, and the data carried by channel B of the special subframes transmitted by cell 1, cell 2, and cell 3 may not be the same, but cell 1, cell 2, and cell 3
  • the channel A of the transmitted special subframe carries the same data, and the channel A bearer dedicated reference signal of the special subframe can correspond to the virtual cell 4.
  • Terminal a can measure the downlink channel quality of Cell 1, Cell 2 and Cell 3 in the existing manner.
  • the manner in which the terminal a measures the downlink channel quality of the virtual cell 4 may be: The terminal a measures the channel quality of the channel A by receiving the dedicated reference signal carried by the channel A of the special subframe, and measures the channel quality of the measured common channel A as The downlink channel quality of the virtual cell 4.
  • the terminal can report the downlink channel quality of the measured cell 1, cell 2, cell 3, and virtual cell 4 to the base station by using the quality report.
  • the base station can compare the downlink channel quality of the cell 1, the cell 2, the cell 3, and the virtual cell 4 reported by the terminal a, and switch the terminal a to the cell with the best downlink channel quality.
  • the communication quality of the user in the cell handover process can be improved, and smooth handover between cells can be realized.
  • the base station may first switch the user to the virtual cell. 4, after a period of time, if the downlink channel quality of the cell 2 is better than the cell 1, the cell 3, and the virtual cell 4, the base station can switch the user to the cell 2, and use the virtual cell 4 to perform the handover transition, which can implement the cell between the cells. Smooth switching.
  • the cell ID (Cell lD) may also be allocated to the virtual cell 4, so that the virtual cell 4 and the cell 1, the cell 2 or the cell 3 have the same meaning in the cell function.
  • the terminal receives the CoMP service, it can be considered that the terminal currently resides in a virtual cell composed of a plurality of single cells that simultaneously provide services for the terminal.
  • the cell identifiers of the cell 1, the cell 2, the cell 3, and the cell 4 can adopt a unified numbering rule.
  • the virtual cell 4 is composed of the cell 1, the cell 2, and the cell 3.
  • the cell 4 identifier and the cell 1 identifier, the cell 2 identifier, and the cell 3 identifier may have a mapping correspondence relationship, so that the terminal can determine the cell according to the cell 4 identifier.
  • 4 is composed of cell 1, cell 2 and cell 3.
  • each virtual cell includes m single cells, and the cell identifier is m*n (m, n is a positive integer), indicating that the cell is a virtual cell, that is, the same cell obtained by Cell_ID/m is located in the same virtual In the small area, where the remainder is 0, it is a virtual cell, and the remainder is a single cell with other values.
  • the mapping relationship between the virtual cell identifier and the single cell identifier is not limited to this.
  • the identifier of any one of the m single cells may be used as the identifier of the virtual cell.
  • the base station may notify the terminal of the cell identity of the virtual cell that is served by the control signaling or other message, and the terminal learns the mapping of the virtual cell identity and the single cell identity according to the mapping relationship between the virtual cell identity and the single cell identity.
  • the base station only needs to notify the terminal a of the cell ID of the virtual cell served by the terminal a, and the terminal a can determine the cell ID of the single cell included in the virtual cell according to the mapping relationship, and the base station does not need to pass the downlink separately.
  • the control signaling notifies the terminal a of the cell ID of the single cell included in the virtual cell, so the downlink control signaling overhead is reduced.
  • introducing a virtual cell is advantageous for realizing smoothness between users in a cell.
  • Switching assigning a Cell ID to a virtual cell, so that the virtual cell and the single cell have the same meaning in cell function; the cell IDs of the virtual cell and the single cell are uniformly numbered, and since there is only one set of cell IDs, whether it is a virtual cell , or the actual single cell, is included in a set of numbering rules, which can be used to reduce the system design and reduce the modifications that need to be made due to the introduction of the CoMP system.
  • the terminal may infer the cell ID of the single cell included in the virtual cell according to the virtual cell ID, and may reduce downlink control signaling. s expenses.
  • an access network device 600 in the fourth embodiment of the present invention may include: a data scheduling module 610 and a sending module 620.
  • the data scheduling module 610 is configured to schedule downlink data received by the coordinated multi-point transmission service user to a special channel of the special subframe, and the special channel of the special subframe is used as a dedicated channel for accepting coordinated multi-point transmission service users.
  • the special subframe in the radio frame includes a special channel that can serve as a dedicated channel for accepting coordinated multi-point transmission service users, and may also include one or more common control channels that can be shared by various types of users. And PDSCH and the like, the invention is not limited.
  • the data scheduling module 610 can schedule various downlink data of the CoMP user to a special channel of the special subframe, and of course, can only schedule the control information of the CoMP user to the special channel of the special subframe.
  • the data scheduling module 610 can be further configured to schedule control information of the non-CoMP user to one of the special subframes or A plurality of common control channels are used to schedule service data of a CoMP user and/or a non-CoMP user to a PDSCH of a special subframe or the like.
  • the sending module 630 is configured to send the special subframe.
  • the sending module 630 can also be used to send a normal subframe, and the normal subframe and the special subframe can be sent in a time division multiplexing or a frequency division multiplexing manner.
  • the data scheduling module 610 can include:
  • the control information scheduling sub-module 611 is configured to schedule control information of the user receiving the coordinated multi-point transmission service to a special channel of the special subframe.
  • the data scheduling module 610 can include: The reference signal scheduling sub-module 612 is configured to schedule the dedicated reference signal of the special channel of the special subframe to the special channel of the special subframe.
  • the dedicated reference signal carried by the special channel of the special subframe corresponds to the virtual cell, and the virtual cell includes all the single cells that simultaneously serve the same user that receives the coordinated multi-point transmission service.
  • the CoMP user terminal can receive the special channel bearer-specific reference signal of the special subframe by diversity, and can measure the channel quality of the special channel by using the dedicated reference signal, and use the channel quality of the special channel as the downlink channel quality of the virtual cell.
  • the above-mentioned CoMP user terminal or other device can also measure the downlink channel quality of all the single cells that are simultaneously serving the same in the existing manner, and report the measurement result to the network side by using the measurement report.
  • Access network device 600 also includes:
  • the receiving module 630 is configured to receive a measurement report that is received by the user of the coordinated multi-point transmission service, where the measurement report carries downlink channel quality information of all single cells that simultaneously provide services for the user that receives the coordinated multi-point transmission service, and the virtual cell Downstream channel quality information.
  • the switching module 640 is configured to compare all the single cells that are received by the receiving module 630 and provide services for the user that receives the coordinated coordinated multi-point transmission service, and the downlink channel quality of the virtual cell, and switch the user that accepts the coordinated multi-point transmission service to the downlink channel. The best quality community.
  • the foregoing access network device may be a base station, a base station controller, an access point, or another device having similar functions in the communication system, and the like, which is not limited by the present invention.
  • the access network device in this embodiment may be the base station in the second embodiment and the third embodiment, and the functions of the respective functional modules may be specifically implemented according to the methods in the second embodiment and the third embodiment.
  • the access network device in this embodiment may be the base station in the second embodiment and the third embodiment, and the functions of the respective functional modules may be specifically implemented according to the methods in the second embodiment and the third embodiment.
  • Embodiment 2 and Embodiment 3 details are not described herein again.
  • the network side treats the CoMP user and the non-CoMP user differently, and uses the dedicated channel opened for the CoMP user in the specific structure subframe to carry the downlink data of the CoMP user, which is beneficial to complete the specific for the CoMP service. Functional and performance optimization, etc.
  • multiple access points that provide services for the same user terminal can simultaneously transmit special structure subframes, and can use the dedicated channel opened for the CoMP user in the specific structure subframe to carry the control information of the CoMP user, and the CoMP user terminal can implement Diversity receives dedicated channel bearers for CoMP users The control information improves the reception reliability of the control information relatively; the introduction of the virtual cell facilitates smooth switching between users.
  • Embodiment 5
  • a terminal 700 according to Embodiment 5 of the present invention may include:
  • the first receiving module 710 is configured to receive downlink data carried by a special channel of the special subframe, where the special channel of the special subframe is a dedicated channel that accepts a coordinated multipoint transmission service user.
  • the first receiving module 710 can receive the downlink data carried by the special channel of the special subframe that is simultaneously sent by the access point set that serves the terminal 700 at the same time, and obtain the downlink of the special channel bearer of the special subframe.
  • the diversity of the data receives the gain.
  • the demodulation processing module 720 is configured to demodulate and process the downlink data carried by the special channel of the special subframe received by the first receiving module 710.
  • the special subframe in the radio frame includes a special channel that can serve as a dedicated channel for accepting coordinated multi-point transmission service users.
  • the special subframe may also include one or more types that can be shared by various types of users.
  • the common control channel, the PDSCH, and the like are not limited in the present invention.
  • the network side may use the special channel of the special subframe as a dedicated channel of the CoMP user, and schedule various downlink data of the CoMP user to a special channel of the special subframe, and may also only use the CoMP user.
  • the control information is scheduled to a special channel of a special subframe.
  • the network side may also schedule control information of the non-CoMP user to one or more common controls of the special subframe.
  • the channel, the service data of the CoMP user and/or the non-CoMP user is scheduled to the PDSCH of the special subframe.
  • the first receiving module 710 is further configured to receive the service data of the terminal 700 carried by the PDSCH.
  • the network side may also schedule a dedicated reference signal of a special channel to a special channel of the special subframe.
  • the terminal 700 can also include:
  • the second receiving module 730 is configured to receive a dedicated reference signal carried by a special channel of the special subframe.
  • the second receiving module 730 can receive a special reference signal carried by a special channel of a special subframe that is simultaneously sent by the set of access points that simultaneously provide services for the terminal 700, to obtain a special
  • the diversity receive gain of the dedicated reference signal carried by the special channel of the subframe.
  • the demodulation processing module 720 is specifically configured to perform the demodulation and processing of the control information or other data carried by the special channel of the special subframe received by the first receiving module 710 by using the dedicated reference signal received by the second receiving module 730.
  • the second receiving module 730 diversity receives the dedicated reference signal corresponding to the virtual cell, and the virtual cell includes all the single cells that simultaneously provide the same service to the coordinated multi-point transmission service user.
  • the terminal 700 can also include:
  • the first measurement module 740 is configured to measure downlink channel quality of all single cells included in the foregoing virtual cell and provide services for the same user that receives the coordinated multi-point transmission service.
  • the second measurement module 750 is configured to measure the channel quality of the special channel of the special subframe by using the dedicated reference signal received by the second receiving module 730, and measure the channel quality of the measured special channel as the downlink channel of the virtual cell. quality.
  • the reporting module 760 is configured to report, to the network side, the downlink channel quality of the virtual cell measured by the second measurement module 750, and the downlink channel of all the single cells included in the virtual cell that are simultaneously served by the first measurement module and serve the same user. quality.
  • the area and the downlink channel quality of the virtual cell, and the terminal can be switched to the cell with the best downlink channel quality.
  • the terminal 700 in this embodiment may be the terminal a in the second embodiment and the third embodiment, and the functions of the respective functional modules may be specifically implemented according to the methods in the second embodiment and the third embodiment, and the specific implementation process may be implemented.
  • the terminal 700 in this embodiment may be the terminal a in the second embodiment and the third embodiment, and the functions of the respective functional modules may be specifically implemented according to the methods in the second embodiment and the third embodiment, and the specific implementation process may be implemented.
  • Embodiment 2 and Embodiment 3 details are not described herein again.
  • the network side treats the CoMP user and the non-CoMP user differently, and uses the dedicated channel opened for the CoMP user in the specific structure subframe to carry the downlink data of the CoMP user, which is beneficial to complete the specific for the CoMP service. Functional and performance optimization, etc.
  • multiple access points that provide services for the same user terminal can simultaneously transmit special structure subframes, and can use the dedicated channel opened for the CoMP user in the specific structure subframe to carry the control information of the CoMP user, and the CoMP user terminal can implement
  • the diversity receives the control information carried by the CoMP user's dedicated channel, which relatively improves the reception reliability of the control information.
  • Introducing the virtual cell is beneficial for implementation. The user smoothly switches between cells.
  • a communication system is further provided in the embodiment of the present invention, and the communication system may include the access network device as described in Embodiment 4.
  • the network side treats the CoMP user and the non-CoMP user differently, and uses the dedicated channel opened for the CoMP user in the specific structure subframe to carry the downlink data of the CoMP user, Conducive to the completion of specific functions and performance optimization for CoMP services.
  • multiple access points that provide services for the same user terminal can simultaneously transmit special structure subframes, and can use the dedicated channel opened for the CoMP user in the specific structure subframe to carry the control information of the CoMP user, and the CoMP user terminal can implement
  • the diversity receives the control information carried by the dedicated channel of the CoMP user, and the reliability of the control information is relatively improved.
  • the introduction of the virtual cell facilitates smooth handover between users.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: Word read memory, random access memory, disk or optical disk, etc.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé pour une communication multipoint coordonnée (CoMP) ainsi qu'à un dispositif correspondant. Le procédé comprend les étapes suivantes : les données en liaison descendante d'un utilisateur acceptant un service de transmission CoMP sont programmées sur un canal spécial d'une sous-trame de structure spéciale, le canal spécial de la sous-trame de structure spéciale correspondant au canal privé alloué à l'utilisateur acceptant le service de transmission CoMP. Puis, la sous-trame de structure spéciale est transmise. Par la présente invention, un utilisateur acceptant un service de transmission CoMP et un utilisateur n'acceptant pas un service de transmission CoMP sont gérés différemment par un réseau, et les données en liaison descendante d'un utilisateur acceptant un service de transmission CoMP sont transportées par le canal privé alloué à l'utilisateur acceptant le service de transmission CoMP dans la sous-trame de structure spéciale.
PCT/CN2009/071902 2009-05-21 2009-05-21 Procédé pour une communication multipoint coordonnée et dispositif correspondant WO2010133034A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2009/071902 WO2010133034A1 (fr) 2009-05-21 2009-05-21 Procédé pour une communication multipoint coordonnée et dispositif correspondant
CN200980124701.3A CN102084672B (zh) 2009-05-21 2009-05-21 协调多点通信的方法和设备

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CN105933937A (zh) * 2016-04-21 2016-09-07 中国科学院计算技术研究所 一种减少无线通信丢帧的方法和设备

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN102595499A (zh) * 2011-01-11 2012-07-18 中兴通讯股份有限公司 一种ue在多个小区建立混合承载的方法
WO2012094940A1 (fr) * 2011-01-11 2012-07-19 中兴通讯股份有限公司 Procédé permettant à un ue d'établir un support hybride dans une pluralité de cellules
CN102595499B (zh) * 2011-01-11 2015-08-12 中兴通讯股份有限公司 一种ue在多个小区建立混合承载的方法
WO2014198162A1 (fr) * 2013-06-13 2014-12-18 中兴通讯股份有限公司 Procédé d'émission et procédé de réception de données et d'informations de commande, station de base et terminal
CN106576251A (zh) * 2014-08-06 2017-04-19 Lg 电子株式会社 无线通信系统中支持无定形小区的方法和设备
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CN106576251B (zh) * 2014-08-06 2019-12-10 Lg 电子株式会社 无线通信系统中支持无定形小区的方法和设备

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