WO2011023019A1 - 一种提供增强的多播广播业务的方法和基站 - Google Patents

一种提供增强的多播广播业务的方法和基站 Download PDF

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Publication number
WO2011023019A1
WO2011023019A1 PCT/CN2010/073829 CN2010073829W WO2011023019A1 WO 2011023019 A1 WO2011023019 A1 WO 2011023019A1 CN 2010073829 W CN2010073829 W CN 2010073829W WO 2011023019 A1 WO2011023019 A1 WO 2011023019A1
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Prior art keywords
base station
mbs
cell
macro
time
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PCT/CN2010/073829
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English (en)
French (fr)
Inventor
吕开颖
鲁照华
刘扬
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中兴通讯股份有限公司
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Publication of WO2011023019A1 publication Critical patent/WO2011023019A1/zh

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

Definitions

  • the present invention relates to the field of wireless communications, and more particularly to a method and base station for providing enhanced multicast broadcast services.
  • the wireless communication network appears to be an individual user or a group user in order to compensate for the weakness of the macro base station (Macro Base) and the shortcomings of throughput.
  • a femtocell that provides services to provide higher quality and more efficient wireless access for mobile users, especially indoor low-speed mobile users and hotspot users. Users can purchase or install the femtocell base station (Femto BS) for convenience.
  • Multicast Broadcast Service is a technology that transmits data from one data source to multiple targets. It can share resources of the network (including core network and access network) and improve network resources (especially in the air). Utilization of interface resources).
  • MBS Multicast Broadcast Service
  • multi-cell multicast broadcast service Multi-BS MBS
  • MBS Zone The service area (MBS Zone) obtains multi-cell macro diversity gain by transmitting the same data on the same time-frequency resource, so that users at the cell edge can also get better services, and at the same time, the neighboring cell
  • the co-channel interference does not exist, so the base station can provide a higher rate multicast broadcast service by increasing the transmission power.
  • frame-level multi-BS MBS may be provided, that is, different cells are transmitted in the same radio frame.
  • the same multicast broadcast service although macro diversity gain is not available, However, the continuity of the multicast broadcast service can be guaranteed.
  • E-MBS Enhanced MBS, E-MBS
  • the service controller or other network element uniformly schedules resources for the multicast broadcast service.
  • how to provide multicast broadcast services in emerging picocells is a problem that needs to be explored and solved.
  • the technical problem to be solved by the present invention is to provide a method and a base station for providing enhanced multicast broadcast services, which can avoid interference with enhanced multicast broadcast services.
  • the present invention provides a method for providing an enhanced multicast broadcast service, including: when an enhanced multicast broadcast service (E-MBS) of a base station overlapping a coverage area of a macro cell base station is turned off, The base station acquires the time-frequency resource used by the macro-cell base station to send the E-MBS, and does not send signaling and/or data on the time-frequency resource, thereby avoiding interference to the enhanced multicast broadcast service.
  • E-MBS enhanced multicast broadcast service
  • the E-MBS is transmitted in the macro cell base station by using a multi-cell macro diversity transmission manner; and the time-frequency resource is a time-frequency resource in which the E-MBS is transmitted in a multi-cell macro diversity manner.
  • the base station acquires the time-frequency resource in one or two of the following manners: the base station monitors a broadcast message of a macro-cell base station that is overlapped with the base station, and acquires a time when the macro-cell base station sends an E-MBS The frequency resource location; the base station acquires, by using the network side, the time-frequency resource location of the E-MBS sent by the macro-cell base station.
  • the method further includes: the base station notifying the terminal of a subframe position that does not send signaling and/or data by itself, where the terminal does not receive signaling and/or at the subframe positions. Or data.
  • the method further includes: when the base station supports E-MBS and the terminal in the current cell does not request to receive the E-MBS or all the terminals in the current cell have ended receiving the E-MBS, the base station turns off the E-MBS.
  • the method further includes: when the terminal in the macro cell initiates a handover request, and the terminal indicates that it is required to keep receiving the multicast broadcast service in the handover request, the macro cell base station and The base station negotiates the E-MBS capability status of the base station; after the negotiation is complete, the macro cell base station responds to the handover command to the terminal, where the handover command carries the E-MBS capability status of all candidate target cells; and the terminal is based at least according to the The E-MBS capability status of the candidate target cell selects a target cell from the candidate target cells, and sends a handover indication to the macro cell base station.
  • the E-MBS capability status includes: supporting E-MBS and E-MBS activated, supporting E-MBS and E-MBS service shutdown, and not supporting one of E-MBS.
  • the method further includes: the macro cell base station determining an E-MBS capability status of the base station to which the target cell selected by the terminal belongs, if the E-MBS is supported and the E- When the MBS is off, it indicates that the base station to which the target cell belongs activates the E-MBS.
  • the method further includes: the terminal entering an active mode from an idle mode, selecting the base station jurisdiction cell to perform network re-access, the base station learning, by the network side, that the terminal is to receive E-MBS, if the E-MBS of the base station The capability status is to turn off the E-MBS, then the base station activates the E-MBS.
  • the base station is a pico cell base station or a second macro cell base station.
  • the present invention provides a method for providing an enhanced multicast broadcast service, including: acquiring, by a base station overlapping with a coverage area of a macro cell base station, the macro cell base station for transmitting an enhanced multicast broadcast service (E) -MBS) time-frequency resource; the base station selects a modulation and coding mode according to the interference measurement result on the time-frequency resource; The base station transmits signaling and/or data of the unicast service by using the selected modulation and coding mode, thereby avoiding interference to the enhanced multicast broadcast service.
  • E enhanced multicast broadcast service
  • the E-MBS transmits the E-MBS in the macro cell base station in a multi-cell macro diversity transmission manner, where the time-frequency resource is a time-frequency resource in which the E-MBS is transmitted in a multi-cell macro diversity manner.
  • the base station acquires the time-frequency resource by using one or two of the following modes: the base station monitors a broadcast message of a macro-cell base station that overlaps the coverage, and acquires a time-frequency resource that the macro-cell base station sends the E-MBS. Position: The base station acquires a time-frequency resource location for transmitting the E-MBS through the network side.
  • the method further includes: when the terminal in the macro cell initiates a handover request, and the terminal indicates that it is required to keep receiving the multicast broadcast service in the handover request, the macro cell base station and The base station negotiates the E-MBS capability status of the base station; after the negotiation is complete, the macro cell base station responds to the handover command to the terminal, where the handover command carries the E-MBS capability status of all candidate target cells; and the terminal is based at least according to the The E-MBS capability status of the candidate target cell selects a target cell from the candidate target cells, and sends a handover indication to the macro cell base station.
  • the E-MBS capability status includes: supporting E-MBS and E-MBS activated, supporting E-MBS and E-MBS off, and not supporting one of E-MBS.
  • the method further includes: the macro cell base station determining an E-MBS capability status of the base station to which the target cell selected by the terminal belongs, if the E-MBS service is supported and the E - When the MBS service is closed, the base station to which the target cell belongs is activated to activate the E-MBS service.
  • the method further includes: the terminal entering an active mode from an idle mode, selecting the base station jurisdiction cell to perform network re-access, the base station learning, by the network side, that the terminal is to receive E-MBS, if the E-MBS of the base station The capability status is to turn off the E-MBS, then the base station activates the E-MBS.
  • the base station is a pico cell base station or a second macro cell base station.
  • the present invention provides a base station that provides an enhanced multicast broadcast service, including a determining module, a resource obtaining module, and a sending module, where: the determining module is configured to: When the broadcast broadcast service (E-MBS) is in the off state, it is further determined whether the coverage area of the base station overlaps with the coverage area of the macro cell base station, and if so, the resource acquisition module is invoked; the resource acquisition module is set as: The macro cell base station is configured to send the time-frequency resource of the E-MBS, and send the obtained time-frequency resource to the sending module.
  • the sending module is configured to: stop sending signaling and/or data on the time-frequency resource.
  • the present invention provides a base station that provides an enhanced multicast broadcast service, including a determining module, a resource obtaining module, and a sending module, where: the determining module is configured to: determine a coverage area of the base station and When the coverage area of the macro cell base station overlaps, the resource acquisition module is invoked; the resource acquisition module is configured to: acquire a time-frequency resource used by the macro cell base station to send an enhanced multicast broadcast service (E-MBS), The obtained time-frequency resource is sent to the sending module.
  • the sending module is configured to: select a modulation and coding mode according to the interference measurement result on the time-frequency resource, and send the signaling of the unicast service by using the selected modulation and coding mode. data.
  • the present invention can effectively reduce the interference of the pico-cell base station in the synchronous multicast broadcast transmission coverage area, that is, reduce the interference of the pico-cell to the macro-cell multicast broadcast service, and at the same time, the pico-cell base station needs to receive the E- according to the terminal served by the femtocell.
  • the MBS service can be used to enable and disable the E-MBS service, which can save power for the pico cell and save the bandwidth resources of the pico cell and the network side. It can better serve private users and improve the system's service quality.
  • the drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawings: FIG.
  • FIG. 1 is a schematic diagram of a frame in which a pico-cell base station does not transmit signaling and/or data information on a resource for transmitting a multicast broadcast service by a macro cell
  • FIG. 2 is a micro-cell base station-to-multicast broadcast according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a frame in which a pico-cell base station transmits signaling and/or data information at a lower power on a resource in which a macro cell transmits a multicast broadcast service
  • FIG. 4 is a third pico-cell according to an embodiment of the present invention; Schematic diagram of the processing flow of the base station to the multicast broadcast service resource;
  • FIG. 5 is a schematic diagram of a frame in which a pico-cell base station transmits the same multicast broadcast service in different subframes of a radio frame in which a macro cell transmits a multicast broadcast service
  • FIG. 6a and 6b are macro-diversity and non-macro of multi-cell multicast broadcast service.
  • FIG. 7 is a schematic diagram of a frame for dynamically scheduling a single cell multicast broadcast service at a location different from a time-frequency resource of a macro cell transmitting a multicast broadcast service by a pico-cell base station.
  • An implementation of the preferred embodiment of the present invention is: when the enhanced multicast broadcast service (E-MBS) of the base station overlapping the coverage area of the macro cell base station is closed, the base station acquires the macro cell base station for transmitting E - Time-frequency resources of the MBS, no signaling and/or data is transmitted on the time-frequency resources.
  • Another implementation scheme is: a base station that overlaps with a coverage area of a macro cell base station acquires a time-frequency resource used by the macro cell base station to transmit an enhanced multicast broadcast service (E-MBS), where the base station is in the time-frequency resource.
  • the modulation coding mode is selected according to the interference measurement result, and the signaling and/or data of the unicast service is transmitted by using the selected modulation and coding mode.
  • the above base station is a pico cell base station or a macro cell base station. Through the above scheme, the base station sent by the picocell base station to the macro cell base station can be minimized.
  • the first solution also saves the bandwidth resources (radio resources) that the pico cell is connected to the network side.
  • Solution 2 makes full use of wireless resources and saves wired resources.
  • the coverage area overlap or overlap coverage described herein includes the case where the coverage area of the pico cell is within the coverage area of the macro cell, and the coverage area of the pico cell overlaps with the coverage area of the macro cell.
  • the macro cell base station transmits the E-MBS by using a multi-cell macro diversity transmission method, and the time-frequency resource is a time-frequency resource for transmitting the E-MBS in a multi-cell macro diversity manner. It should be noted that, since the macro cell base station uses the multi-cell macro diversity transmission mode, it must be located in one E-MBS Zone, but the pico cell may belong to the E-MBS Zone or may not belong to the E-MBS Zone.
  • the pico-cell base station acquires the time-frequency resource by using one or two of the following manners: the pico-cell base station monitors a broadcast message (for example, a resource allocation broadcast message) of a macro-cell base station that overlaps the overlay Obtaining, by the macro cell base station, a time-frequency resource location of the E-MBS, where the pico-cell base station acquires, by using the E-MBS service controller or the E-MBS gateway, the macro-cell base station to send the E-MBS. Time-frequency resource location.
  • the pico-cell base station can acquire the resource allocation information of the E-MBS transmitted through the network side by using the foregoing two methods.
  • the macro cell base station and the pico-cell base station negotiate the E- of the pico-cell base station.
  • the MBS capability status (for example, through a handover request and a handover response); after the negotiation is completed, in the handover command message that is sent to the terminal, carrying the E-MBS capability status of all candidate target cells (for example, in the form of a list),
  • the terminal selects a target cell from the candidate target cells according to the E-MBS capability of the candidate target cell, and sends a handover indication to the macro cell base station.
  • the above E-MBS capability status includes: E-MBS is supported and E-MBS is activated; E-MBS is supported and E-MBS is disabled; E-MBS is not supported.
  • the macro cell base station determines that the target cell selected by the terminal is a pico cell, and the E-MBS capability status of the pico cell base station to which the pico cell belongs is E-MBS and the E-MBS is closed, and the macro cell base station indicates The pico cell base station is activated E-MBS.
  • the pico-cell base station may be controlled by the paging controller or other unit of the network (for example, E-MBS gateway or E-MBS service control) Obtaining relevant control information and/or data of the terminal, where at least information related to the E-MBS is included, so that the pico-cell base station can determine, according to the information, whether the terminal is to receive the E-MBS, and if the terminal is receiving the E-MBS, Then, the picocell base station needs to be turned from the off (to be activated) state to the on (active) state, or remains active.
  • the picocell base station may be controlled by the paging controller or other unit of the network (for example, E-MBS gateway or E-MBS service control) Obtaining relevant control information and/or data of the terminal, where at least information related to the E-MBS is included, so that the pico-cell base station can determine, according to the information, whether the terminal is to receive the E-MBS, and if the terminal is receiving the E-MBS,
  • the control and/or data information of the multicast broadcast service is obtained through the E-MBS gateway or the E-MBS service controller on the network side.
  • the multicast broadcast service may be provided in a single cell multicast broadcast mode, or a multi-cell multicast broadcast mode (including macro diversity and non-macro diversity mode).
  • the pico-cell base station informs the terminal of the subframe position in which it does not transmit signaling and/or data, and the terminal does not receive signaling and/or data at these subframe positions. Further, the pico-cell base station may make the terminal aware of the subframe position at which the signaling and/or data is not sent by a pre-agreed or message notification (express or implied). For example, the pico-cell base station may explicitly notify the terminal by using a broadcast message (see Table 1 for the format of the broadcast message), where the broadcast message includes one or more of the following information: a superframe, a radio frame, and a radio subframe. Content that is not carried through the broadcast message can be indicated in a pre-agreed manner. The indication of the super frame level or the radio frame level or the sub frame level may be represented by one of the following modes: a Bit Map, a Bit Map Pattern Index, and a table lookup manner; Table 1: System broadcast messages Format
  • the pico-cell base station When the pico-cell base station supports the E-MBS and the terminal in the current pico-cell does not request to receive the E-MBS or all the terminals in the current pico-cell have ended receiving the E-MBS, the pico-cell base station selects to close its E- MBS.
  • the selected modulation and coding mode should at least ensure the signal quality of the unicast user covered by the pico-cell base station.
  • the base station that implements the foregoing solution 1 includes a determining module, a resource acquiring module, and a sending module, where: the determining module is configured to: further determine the present when determining that the enhanced multicast broadcast service (E-MBS) of the base station is in a closed state Whether the coverage area of the base station overlaps with the coverage area of the macro-cell base station, if yes, the resource acquisition module is invoked; the resource acquisition module is configured to: acquire the time-frequency resource used by the macro-cell base station to send the E-MBS, The obtained time-frequency resource is sent to the sending module.
  • the sending module is configured to: stop sending signaling and/or data on the time-frequency resource.
  • the resource obtaining module is configured to acquire the time-frequency resource by using one or two of the following methods: the resource acquiring module monitors a broadcast message of a macro cell base station that overlaps with the base station, and acquires the macro cell.
  • the base station sends the time-frequency resource location of the E-MBS; the base station acquires, by using the network side, the time-frequency resource location of the E-MBS sent by the macro-cell base station.
  • the transmitting module is further configured to: inform the terminal of the subframe position at which the base station does not transmit signaling and/or data, so that the terminal does not receive signaling and/or data at the subframe positions.
  • the determining module is further configured to: when determining that the base station supports E-MBS, and the terminal in the current cell does not request to receive E-MBS or all terminals in the current cell have ended receiving E-MBS, close the E-MBS .
  • the base station implementing the foregoing solution 2 includes a determining module and a sending module, where: The determining module is configured to: when the coverage area of the base station overlaps with the coverage area of the macro cell base station, the resource acquisition module is invoked; the resource acquisition module is configured to: acquire the macro cell base station to send the enhanced type The time-frequency resource of the multicast broadcast service (E-MBS) is sent to the sending module, and the sending module is configured to: select a modulation and coding mode according to the interference measurement result on the time-frequency resource, and use The selected modulation and coding mode transmits signaling and/or data of the unicast service.
  • E-MBS multicast broadcast service
  • the present invention will be further described by taking a pico cell as an example, and the processing method for the macro cell is the same.
  • the macro cell and the pico cell may exist in the area of the multi-cell synchronous transmission multicast broadcast service, and the E-MBS service service controller or the scheduler on the network side uniformly schedules the multicast broadcast service resource, and sends the control information and data to the multi-cell.
  • the pico cell may not send the multicast broadcast service.
  • the terminal activates the multicast broadcast service or the network side activates the multicast broadcast service
  • the pico cell may be different according to the scenario.
  • the sending mode sends a multicast broadcast service, and the sending mode includes: a multi-cell macro diversity sending mode, a multi-cell non-macro-diversity transmitting mode, and a single cell sending mode; when there is no activated multicast broadcast service, the sending mode may not be sent. Broadcast broadcast business.
  • Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
  • Embodiment 1 When the capability status of the multicast broadcast service of the pico-cell base station is off, the pico-cell base station is in the coverage area of a macro-cell base station, and the macro-cell base station and the pico-cell base station belong to one multi-cell synchronous transmission.
  • the pico-cell base station may not transmit any multicast broadcast service data when all terminals that use the pico-cell base station as the serving base station do not receive the demand for the multicast broadcast service.
  • FIG. 1 When the capability status of the multicast broadcast service of the pico-cell base station is off, the pico-cell base station is in the coverage area of a macro-cell base station, and the macro-cell base station and the pico-cell base station belong to one multi-cell synchronous transmission.
  • the pico-cell base station may not transmit any multicast broadcast service data when all terminals that use the pico-cell base station as the serving base station do not
  • Step 110 When the multicast broadcast service is synchronously scheduled by the network side to all or part of the subcarrier resources of some wireless subframes in the macro cell, the picocell base station multicasts from the network side.
  • the picocell base station does not send any signaling and/or data on the time-frequency resources; that is, the pico-cell base station Signaling and/or data is transmitted only on time-frequency resources other than the time-frequency resources, or the pico-cell base station stops transmitting signaling and/or data on the time-frequency resources.
  • the pico-cell base station stops transmitting signaling and/or data on the time-frequency resources.
  • Step 130 The pico-cell base station informs the terminal not to send any indication information of the subframe position of the signaling and/or data by using a broadcast message, such as system configuration description information.
  • Step 140 The macro cell base station determines whether a macro cell in its jurisdiction is ready to switch to the pico cell, and the terminal needs to keep receiving the multicast broadcast service. If yes, go to step 150, otherwise end; if the macro cell base station receives the terminal If the handover request information (MSHO-REQ) is sent, and the E-MBS request is included in the information, or the macro-cell base station learns that the terminal is receiving the E-MBS by other means, the above condition is considered to be established, and step 150 is performed.
  • MSHO-REQ handover request information
  • Step 150 The macro cell base station sends a handover request message (HO-REQ) to the candidate target base station, including the pico-cell base station, by the network side, and the message includes an E-MBS request.
  • Step 160 After receiving the message, the pico cell receives the message. In response, the capability status of the EMBS is fed back; in step 170, the macro cell base station transmits a candidate target cell list ( candidate target BSs) in the handover command message (BSHO-CMD) sent to the terminal, and carries the E-MBS capability of the candidate target cell.
  • the foregoing capability status may include only supporting the E-MBS service or not supporting the E-MBS service, and the terminal screening the cell access supporting the E-MBS service. Or you can not carry the ability status, but by the small
  • the area base station directly filters the target cell supporting the E-MBS service and adds it to the candidate target cell list.
  • Step 180 The terminal selects a suitable final target cell to send a handover indication (HO-IND) to perform handover.
  • Embodiment 2 When the pico-cell base station does not support the multicast broadcast service, the pico-cell base station is in the coverage area of a macro-cell base station, and the macro-cell base station and the pico-cell base station belong to a multi-cell synchronous transmission multicast broadcast service area.
  • the pico-cell base station may send the signaling of the unicast service on the time-frequency resource of the multicast broadcast service allocated by the network side and/or Or data, but the transmission power is limited, and the pico-cell base station can determine the modulation and coding mode used for transmitting the unicast service on the resource according to the interference on the resource for measuring the E-MBS service transmitted by the macro-cell base station, so as to reduce the pico The interference of the cell base station to the macro cell base station terminal receiving the E-MBS data and the interference of the macro cell base station E-MBS data to the unicast data of the terminal under the pico cell base station.
  • FIG. 3 is a schematic diagram of a frame in which a pico-cell base station transmits signaling and/or data information at a lower power on a resource in which a macro cell transmits a multicast broadcast service.
  • FIG. 4 is a schematic diagram of a process flow of a micro-cell base station to a multicast broadcast service resource, including the following steps: Step 210: A pico-cell base station can obtain a multicast broadcast service by listening to a broadcast message of a macro-cell base station that overlaps the coverage Resource location information, or when the pico-cell base station also belongs to one of the multi-cell synchronous transmission multicast broadcast service areas, the resource location information of the multicast broadcast service may be acquired by the network side; Step 220: The pico-cell base station reduces the transmit power on the sub-carrier resources, that is, selects a more reliable modulation and coding rate to send signaling and/or data of the unicast service to the user on the resources at a lower data rate.
  • the picocell base station is in a coverage area of a macro cell base station, and the macro cell base station and the pico cell base station belong to a multi-cell synchronous transmission multicast broadcast service area, and the multicast broadcast service is synchronously scheduled by the network side.
  • the pico-cell base station and the macro-cell base station may provide the multicast broadcast service in a macro diversity or non-macro-diversity transmission manner.
  • the pico-cell base station acquires resource location, control information, and/or data information of the multicast broadcast service through the network side.
  • the pico cell and the macro cell synchronously transmit the multicast broadcast service, that is, the pico cell transmits the same multicast broadcast service in the same subframe in the radio frame that the macro cell transmits the multicast broadcast service.
  • the pico cell transmits the same multicast broadcast service content on a different subframe than the radio frame in which the macro cell transmits the multicast broadcast service.
  • FIG. 5 is a schematic diagram of a frame in which a pico-cell base station transmits the same multicast broadcast service on different subframes in a radio frame in which a macro cell transmits a multicast broadcast service.
  • the macro-diversity multi-cell synchronously transmits the multicast broadcast service, that is, the macro-diversity transmission mode, in which multiple macro-cells transmit the same multicast broadcast service data in the same time-frequency resource in a synchronized manner, thereby obtaining macro diversity gain,
  • the coverage is increased, and the multicast broadcast service throughput of the cell edge user is increased.
  • the data sent by the multi-cell on the resource is the same, there is no interference, so that the transmission can be performed with higher power, and the system capacity is further improved.
  • the multi-cell transmission multicast service that does not support macro diversity, that is, the non-macro-diversity transmission mode, transmits the same multicast broadcast service data in a manner of synchronizing in one radio frame through multiple macro cells, and each macro cell does not need to be strict.
  • the symbols are synchronized, and each macro cell can transmit the same multicast broadcast service content in different subframes within the same radio frame, and the terminal can receive multiple by the same The multicast broadcast service data packet of the content, thereby obtaining a selective combining gain, to improve the reception reliability of the multicast broadcast service of the cell edge user.
  • each macro cell base station configures the same multicast broadcast subframe, and for a multi-cell multicast broadcast service transmission mode that does not support macro diversity, each macro The cell base stations are in the same radio frame, but different multicast broadcast subframes can be configured.
  • the user who uses the pico cell as the serving cell can obtain the multicast broadcast service of the cell, and at the same time, selectively receives the same multicast broadcast service content sent by the macro cell in other subframes. merge.
  • the user who uses the macro cell as the serving cell can obtain the multicast broadcast service of the cell, and simultaneously performs selective merging by receiving the same multicast broadcast service content sent by the nearby pico cell in other subframes. Thereby improving the quality of service of the multicast broadcast service.
  • the pico cell enters the low-duty mode, the multicast broadcast service continues to transmit. Parameters such as the resource allocation period of the multicast broadcast service do not affect the low energy operation mode.
  • Embodiment 4 It is assumed that the pico-cell base station and the macro-cell base station use different carrier frequencies, or the terminal that the pico-cell base station is serving has only a small number of receiving multicast broadcast services, and the pico-cell base station can provide multicast for its service users in a single-cell transmission manner. Broadcasting business.
  • the pico-cell base station acquires the data information of the multicast broadcast service through the network side, and dynamically transmits and transmits the multicast broadcast service data by the pico-cell base station.
  • FIG. 7 is a schematic diagram of a frame in which a pico-cell base station dynamically schedules a single-cell multicast broadcast service at a position different from a time-frequency resource in which a macro-cell transmits a multicast broadcast service.
  • Single-cell transmission of multicast broadcast service is to transmit multicast broadcast service through flexible dynamic scheduling resources of the base station, without multi-cell macro diversity and selective combining gain, but the base station does not need to coordinate with other base stations.
  • the resources are flexible, so the resources can be flexibly scheduled. It is suitable for scenarios that cannot be synchronized well with other base stations and scenarios where inter-frequency points work.
  • the terminal can reliably and efficiently receive the multicast broadcast service.
  • the problem of interference coordination for providing multicast broadcast service between the pico cell and the macro cell in the system is solved, and the performance of the multicast broadcast service of the system can be improved by the invention.
  • One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
  • the pico-cell base station needs according to whether the terminal served by itself Receiving the E-MBS service to enable and disable the E-MBS service can save power to the pico cell and save the bandwidth resources of the pico cell and the network side. It can better serve private users and improve the system's service quality. .

Description

一种提供增强的多播广播业务的方法和基站
技术领域 本发明涉及无线通信领域， 更具体地涉及一种提供增强的多播广播业务 的方法和基站。
背景技术
无线通信网络除了有可以为公众提供服务的宏小区 （Macrocell ) , 为了 为弥补宏基站（ Macro Base Station, Macro BS ) 室内覆盖不足和吞吐量较氐 的弱点， 还出现了为个人用户或集团用户提供服务的微微小区 （Femtocell), 以便为移动用户尤其是室内低速移动的用户及热点地区的用户提供更高质量 且更高效率的无线接入。 用户可以自己购买或安装微微小区基站 （Femto BS ) , 使用便利。 多播广播业务（ Multicast Broadcast Service, MBS )是一种从一个数据源 向多个目标传送数据的技术， 能实现网络（包括核心网和接入网 ) 资源的共 享， 提高网络资源 （尤其是空中接口资源） 的利用率。 随着互联网的普及和 多媒体技术的发展， 多媒体共享业务的应用越来越广， 同时数据量也越来越 大， 高效地进行多播和广播业务传输对于下一代移动通信系统也变得空前重 要。
目前在无线通信系统的宏小区中提供多播广播业务已经是业界公认且可 以实施的服务， 为了提高多播广播业务的覆盖范围， 多个同步的宏小区可以 构成一个多小区多播广播业务（multi-BS MBS )服务区域（MBS Zone ) , 通 过在同一时频资源上发送相同的数据获得多小区宏分集增益， 使得在小区边 缘的用户也能得到更好的服务， 同时由于此时邻小区同频（co-channel )干扰 不存在， 因此基站可以通过增大发射功率， 从而提供更高速率的多播广播服 务。 对于不能与多小区多播广播业务服务区域获得很好同步的基站， 可以提 供帧级同步的多小区多播广播业务（frame-level multi-BS MBS ) , 即不同小 区在相同的无线帧内发送相同的多播广播业务， 尽管不能获得宏分集增益， 但是可以保证多播广播业务的连续性。 一个宏基站的覆盖区域内可能存在大量的家庭基站， 所有类型小区均可 以加入到多小区多播广播服务区域中， 由网络侧的增强型多播广播业务
( Enhanced MBS , E-MBS )服务控制器或其它网元统一调度多播广播业务的 资源。 但是在新兴的微微小区中如何提供多播广播服务是当前需要探讨和解决 的问题。
发明内容
本发明要解决的技术问题是提供一种提供增强的多播广播业务的方法和 基站， 能够避免对增强的多播广播业务产生干扰。 为解决上述技术问题， 本发明提供了一种提供增强的多播广播业务的方 法， 包括： 与宏小区基站覆盖区域重叠的基站的增强型多播广播业务（E-MBS ) 关 闭时， 所述基站获取所述宏小区基站用于发送 E-MBS 的时频资源， 在所述 时频资源上不发送信令和 /或数据， 从而避免对增强的多播广播业务产生干扰。 所述 E-MBS 在所述宏小区基站是釆用多小区宏分集发送方式发送； 所 述时频资源为以多小区宏分集方式发送 E-MBS的时频资源。 所述基站釆用以下方式中的一种或两种获取所述时频资源： 所述基站监听与所述基站重叠覆盖的宏小区基站的广播消息， 获取该宏 小区基站发送 E-MBS的时频资源位置； 所述基站通过网络侧获取所述宏小区基站发送 E-MBS的时频资源位置。 获取时频资源的步骤之后， 所述方法还包括： 所述基站将自己不发送信 令和 /或数据的子帧位置告知给终端，所述终端在这些子帧位置上不接收信令 和 /或数据。 所述方法还包括： 当所述基站支持 E-MBS且当前小区内的终端没有请 求接收 E-MBS或当前小区内的所有终端均已结束接收 E-MBS时， 所述基站 关闭 E-MBS。 获取时频资源的步骤之后， 所述方法还包括： 当所述宏小区内的终端发起切换请求， 且所述终端在切换请求中指示需 要保持接收多播广播业务时， 所述宏小区基站与所述基站协商该基站的 E-MBS能力状态； 协商完毕后， 所述宏小区基站向终端响应切换命令， 所述切换命令携带 所有候选目标小区的 E-MBS能力状态； 以及 所述终端至少根据候选目标小区的 E-MBS 能力状态从候选目标小区中 选择一目标小区， 向所述宏小区基站发送切换指示。 所述 E-MBS能力状态包括：支持 E-MBS且 E-MBS已激活 ,支持 E-MBS 且 E-MBS业务关闭， 以及不支持 E-MBS中的一种。 向所述宏小区基站发送切换指示的步骤之后， 所述方法还包括： 所述宏 小区基站判断所述终端选择的目标小区所属基站的 E-MBS 能力状态， 若为 支持 E-MBS且 E-MBS关闭， 则指示所述目标小区所属基站激活 E-MBS。 所述方法还包括： 所述终端从空闲模式进入激活模式， 选择所述基站管 辖小区进行网络重接入， 所述基站通过网络侧获知终端将要接收 E-MBS, 若 所述基站的 E-MBS能力状态为关闭 E-MBS , 则所述基站激活 E-MBS。 所述基站为微微小区基站或第二宏小区基站。
为解决上述技术问题， 本发明提供了一种提供增强的多播广播业务的方 法， 包括： 与宏小区基站覆盖区域重叠的基站获取所述宏小区基站用于发送增强型 多播广播业务（E-MBS ) 的时频资源； 所述基站在所述时频资源上根据干扰测量结果选择调制编码方式； 以及 所述基站釆用选择的调制编码方式发送单播业务的信令和 /或数据， 从而避免对增强的多播广播业务产生干扰。 所述 E-MBS 在所述宏小区基站是釆用多小区宏分集发送方式发送 E-MBS; 其中， 所述时频资源为以多小区宏分集方式发送 E-MBS 的时频资 源。 所述基站釆用以下方式中的一种或两种获取所述时频资源： 所述基站监听与之重叠覆盖的宏小区基站的广播消息， 获取该宏小区基 站发送 E-MBS的时频资源位置； 所述基站通过网络侧获取发送 E-MBS的时频资源位置。 获取时频资源的步骤之后， 所述方法还包括： 当所述宏小区内的终端发起切换请求， 且所述终端在切换请求中指示需 要保持接收多播广播业务时， 所述宏小区基站与所述基站协商该基站的 E-MBS能力状态； 协商完毕后， 所述宏小区基站向终端响应切换命令， 所述切换命令携带 所有候选目标小区的 E-MBS能力状态； 以及 所述终端至少根据候选目标小区的 E-MBS 能力状态从候选目标小区中 选择一目标小区， 向所述宏小区基站发送切换指示。 所述 E-MBS能力状态包括：支持 E-MBS且 E-MBS已激活 ,支持 E-MBS 且 E-MBS关闭， 以及不支持 E-MBS中的一种。 向所述宏小区基站发送切换指示的步骤之后， 所述方法还包括： 所述宏 小区基站判断所述终端选择的目标小区所属基站的 E-MBS 能力状态， 若为 支持 E-MBS 业务且 E-MBS 业务关闭， 则指示所述目标小区所属基站激活 E-MBS业务。 所述方法还包括： 所述终端从空闲模式进入激活模式， 选择所述基站管 辖小区进行网络重接入， 所述基站通过网络侧获知终端将要接收 E-MBS, 若 所述基站的 E-MBS能力状态为关闭 E-MBS, 则所述基站激活 E-MBS。 所述基站为微微小区基站或第二宏小区基站。
为解决上述技术问题， 本发明提供了一种提供增强的多播广播业务的基 站， 包括判断模块、 资源获取模块和发送模块， 其中： 所述判断模块设置为： 在判定本基站的增强型多播广播业务（E-MBS ) 为关闭状态时， 进一步判断本基站的覆盖区域与宏小区基站覆盖区域是否重 叠， 如果是， 则调用所述资源获取模块； 所述资源获取模块设置为： 获取所述宏小区基站用于发送 E-MBS 的时 频资源， 将得到的时频资源发送给发送模块； 所述发送模块设置为： 在所述时频资源上停止发送信令和 /或数据。
为解决上述技术问题， 本发明提供了一种提供增强的多播广播业务的基 站， 包括判断模块、 资源获取模块和发送模块， 其中： 所述判断模块设置为： 在判定本基站的覆盖区域与宏小区基站的覆盖区 域重叠时， 调用所述资源获取模块； 所述资源获取模块设置为： 获取所述宏小区基站用于发送增强型多播广 播业务（E-MBS ) 的时频资源， 将得到的时频资源发送给发送模块； 所述发送模块设置为： 在所述时频资源上根据干扰测量结果选择调制编 码方式， 釆用选择的调制编码方式发送单播业务的信令和 /或数据。
通过本发明， 能够有效减少微微小区基站在同步多播广播发送覆盖区域 内的干扰， 即减少微微小区对宏小区多播广播业务的干扰， 同时微微小区基 站根据自己服务的终端是否需要接收 E-MBS 业务来开启和关闭 E-MBS服 务，既可以使微微小区省电， 同时节约了微微小区与网络侧连接的带宽资源， 可更好地为私有用户提供服务， 提高系统的服务质量。 附图概述 附图用来提供对本发明的进一步理解， 并且构成说明书的一部分， 与本 发明的实施例一起用于解释本发明， 并不构成对本发明的限制。 在附图中： 图 1是微微小区基站在宏小区发送多播广播业务的资源上不发送信令和 /或数据信息的帧示意图； 图 2是本发明实施例一微微小区基站对多播广播业务资源的处理流程示 意图； 图 3是微微小区基站在宏小区发送多播广播业务的资源上以较低功率发 送信令和 /或数据信息的帧示意图； 图 4是本发明实施例三微微小区基站对多播广播业务资源的处理流程示 意图；
图 5是微微小区基站在宏小区发送多播广播业务的无线帧中的不同子帧 上发送相同多播广播业务的帧示意图； 图 6a和 6b是多小区多播广播业务的宏分集和非宏分集发送模式子帧配 置示意图； 图 7是微微小区基站在与宏小区发送多播广播业务的时频资源不同的位 置上动态调度单小区多播广播业务的帧示意图。
本发明的较佳实施方式 一种实现方案是： 与宏小区基站覆盖区域重叠的基站的增强型多播广播 业务（E-MBS ) 关闭时， 所述基站获取所述宏小区基站用于发送 E-MBS 的 时频资源， 在所述时频资源上不发送信令和 /或数据。 另一种实现方案是： 与宏小区基站覆盖区域重叠的基站获取所述宏小区 基站用于发送增强型多播广播业务（E-MBS ) 的时频资源， 所述基站在所述 时频资源上根据干扰测量结果选择调制编码方式， 釆用选择的调制编码方式 发送单播业务的信令和 /或数据。 上述基站为微微小区基站或宏小区基站。 通过以上方案， 可以最大限度减少微微小区基站对宏小区基站发送的
E-MBS产生的干扰。 另外， 釆用方案一还节约了微微小区与网络侧连接的带 宽资源 （无线资源） 。 而方案二则充分利用无线资源， 节约了有线资源。
本文所述的覆盖区域重叠或者重叠覆盖包括以下情况， 微微小区的覆盖 区域在宏小区的覆盖区域内，微微小区的覆盖区域与宏小区的覆盖区域重叠。 上述宏小区基站釆用多小区宏分集发送方式发送 E-MBS,所述时频资源 为以多小区宏分集方式发送 E-MBS 的时频资源。 需要说明的是， 由于宏小 区基站釆用多小区宏分集发送方式， 其必然位于一个 E-MBS Zone内， 但微 微小区可以属于该 E-MBS Zone也可以不属于该 E-MBS Zone。 优选地， 所述微微小区基站釆用以下方式中的一种或两种获取所述时频 资源： 所述微微小区基站监听与之重叠覆盖的宏小区基站的广播消息 （例如 资源分配广播消息） ， 获取该宏小区基站发送 E-MBS 的时频资源位置； 所 述微微小区基站通过网络侧 (例如通过 E-MBS服务控制器或 E-MBS网关） 获取所述宏小区基站发送 E-MBS 的时频资源位置。 微微小区基站可以同时 釆用上述两种方式获取， 例如通过网络侧发送的 E-MBS的资源分配信息。 当所述宏小区内的终端发起切换请求， 且所述终端在切换请求消息中指 示需要保持接收多播广播业务时， 所述宏小区基站与所述微微小区基站协商 该微微小区基站的 E-MBS 能力状态 （例如通过切换请求和切换响应进行协 商） ； 协商完毕后， 在向终端响应的切换命令消息中， 携带所有候选目标小 区的 E-MBS能力状态 (例如通过列表的形式） , 所述终端至少根据候选目标 小区的 E-MBS 能力从候选目标小区中选择一目标小区， 向所述宏小区基站 发送切换指示。 上述 E-MBS能力状态包括：支持 E-MBS且 E-MBS已激活；支持 E-MBS 且 E-MBS关闭； 不支持 E-MBS。 所述宏小区基站判断所述终端选择的目标 小区为微微小区， 且所述微微小区所属微微小区基站的 E-MBS 能力状态为 支持 E-MBS且 E-MBS关闭， 则所述宏小区基站指示所述微微小区基站激活 E-MBS。 当所述终端从空闲模式进入到激活模式， 选择所述微微小区进行网络重 接入时， 微微小区基站可以通过寻呼控制器或网络的其它单元（例如 E-MBS 网关或 E-MBS服务控制器）获得终端的相关控制信息和 /或数据， 其中至少 包括与 E-MBS有关的信息， 使微微小区基站根据该信息可以判断该终端是 否要接收 E-MBS, 如果终端正在接收 E-MBS, 则所述微微小区基站需要从 关闭 （待激活）状态转为开启 （激活）状态， 或保持激活状态。 所述微微小 区基站激活 E-MBS后， 通过网络侧的 E-MBS网关或 E-MBS服务控制器获 得多播广播业务的控制和 /或数据信息。 可以以单小区多播广播方式， 或者多 小区多播广播方式（包括宏分集和非宏分集方式）提供多播广播业务。
特别地， 针对第一种方案： 所述微微小区基站将自己不发送信令和 /或数据的子帧位置告知给终端， 所述终端在这些子帧位置上不接收信令和 /或数据。 进一步地， 所述微微小区 基站可以通过预先约定或者消息通知 （明示或者暗示） ， 使终端获知其不发 送信令和 /或数据的子帧位置。 例如， 微微小区基站可以通过广播消息（该广 播消息的格式参见表 1 ) 明示地通知终端， 所述广播消息中包括以下信息中 的一种或几种： 超帧、 无线帧和无线子帧， 未通过广播消息携带的内容可通 过预先约定的方式指示。 所述超帧级或者无线帧级或者子帧级的指示可以通 过以下方式之一表示： 比特位图（Bit Map)、 图样索引（Bit Map Pattern Index) 和查表方式； 表 1 : 系统广播消息的格式
Figure imgf000010_0001
当所述微微小区基站支持 E-MBS 且当前微微小区内的终端没有请求接 收 E-MBS或当前微微小区内的所有终端均已结束接收 E-MBS时， 所述微微 小区基站选择关闭其 E-MBS。
针对第二种方案： 所述选择的调制编码方式至少应保证该微微小区基站覆盖下的单播用户 的信号质量。
实现上述方案一的基站包括判断模块、资源获取模块和发送模块，其中： 所述判断模块设置为： 在判定本基站的增强型多播广播业务（E-MBS ) 为关闭状态时， 进一步判断本基站的覆盖区域与宏小区基站覆盖区域是否重 叠， 如果是， 则调用所述资源获取模块； 所述资源获取模块设置为： 获取所述宏小区基站用于发送 E-MBS 的时 频资源， 将得到的时频资源发送给发送模块； 所述发送模块设置为： 在所述时频资源上停止发送信令和 /或数据。 所述资源获取模块是设置为釆用以下方式中的一种或两种获取所述时频 资源： 所述资源获取模块监听与所述基站重叠覆盖的宏小区基站的广播消息， 获取该宏小区基站发送 E-MBS的时频资源位置； 所述基站通过网络侧获取所述宏小区基站发送 E-MBS的时频资源位置。 所述发送模块还设置为：将基站不发送信令和 /或数据的子帧位置告知给 终端， 以使所述终端在这些子帧位置上不接收信令和 /或数据。 所述判断模块还设置为： 当判定所述基站支持 E-MBS, 且当前小区内的 终端没有请求接收 E-MBS 或当前小区内的所有终端均已结束接收 E-MBS 时， 关闭 E-MBS。
实现上述方案二的基站包括判断模块和发送模块， 其中： 所述判断模块设置为： 在判断本基站的覆盖区域与宏小区基站的覆盖区 域重叠时， 调用所述资源获取模块； 所述资源获取模块设置为： 获取所述宏小区基站用于发送增强型多播广 播业务（E-MBS ) 的时频资源， 将得到的时频资源发送给发送模块； 所述发送模块设置为： 在所述时频资源上根据干扰测量结果选择调制编 码方式， 釆用选择的调制编码方式发送单播业务的信令和 /或数据。
下面以微微小区为例对本发明进一步说明， 对宏小区的处理方法与此相 同。 多小区同步传输多播广播业务的区域内可以存在宏小区和微微小区， 网 络侧的 E-MBS 业务服务控制器或调度器统一调度多播广播业务资源， 并将 控制信息及数据发送到多小区多播广播区域内的每个基站中。 当微微小区当 前所服务用户没有多播广播业务需求时，微微小区可以不发送多播广播业务， 当终端激活多播广播业务或网络侧激活多播广播业务时， 微微小区可以根据 场景以不同的发送模式发送多播广播业务， 所述发送模式包括： 多小区宏分 集发送方式， 多小区非宏分集发送方式， 单小区发送方式； 当没有激活的多 播广播业务的情况下则可以不发送多播广播业务。
下面结合附图详细介绍本发明的实施例。 实施例 1 当微微小区基站的多播广播业务的能力状态为关闭状态， 该微微小区基 站处于一个宏小区基站的覆盖区域内， 且该宏小区基站和微微小区基站同属 于一个多小区同步发送多播广播业务区域中时， 当以微微小区基站为服务基 站的所有终端没有接收多播广播业务的需求时， 微微小区基站可以不发送任 何多播广播业务数据。 图 1给出了微微小区基站在宏小区发送多播广播业务的资源上不发送信 令和 /或数据信息的帧示意图。图 2给出了微微小区基站对多播广播业务资源 的处理流程示意图， 包括以下步骤： 步骤 110, 在宏小区中多播广播业务被网络侧同步调度在某些无线子帧 的全部或部分子载波资源上时， 微微小区基站从网络侧的多播广播业务服务 控制器或调度器上获取这些多播广播业务的资源位置信息； 步骤 120,微微小区基站则在这些时频资源上不发送任何信令和 /或数据； 也就是说， 微微小区基站仅在除该些时频资源以外的时频资源上发送信 令和 /或数据， 或者说， 微微小区基站在该些时频资源上停止发送信令和 /或 数据。 通过在这些时频资源上不发送信令和 /或数据，从而避免与宏小区下的多 播广播业务相互干扰， 影响微微小区基站周围的宏小区基站用户接收多播广 播业务的质量。 步骤 130, 微微小区基站通过广播消息， 如系统配置描述信息， 通知终 端不发送任何信令和 /或数据的子帧位置的指示信息。 步骤 140, 宏小区基站判断其管辖的宏小区中是否有终端准备切换至微 微小区， 且该终端需要保持接收多播广播服务， 如果是， 执行步骤 150, 否 则结束； 如果宏小区基站接收到终端发送的切换请求信息（MSHO-REQ ) , 且该 信息中包含 E-MBS请求， 或者宏小区基站通过其它方式获知终端正在接收 E-MBS, 则认为上述条件成立， 执行步骤 150。 步骤 150, 宏小区基站通过网络侧向候选的目标基站， 包括微微小区基 站， 发送切换请求消息 （HO-REQ ) , 此消息中包含 E-MBS请求； 步骤 160,微微小区收到此消息后进行响应，反馈其 EMBS的能力状态； 步骤 170, 宏小区基站在向终端发送的切换命令消息 （BSHO-CMD ) 中 发送候选目标小区列表（ candidate target BSs ) ,且携带候选目标小区的 E-MBS 能力状态； 上述能力状态可以仅包括支持 E-MBS业务或不支持 E-MBS业务， 终端 筛选支持 E-MBS 业务的小区接入。 或者也可不携带该能力状态， 而由宏小 区基站直接筛选支持 E-MBS 业务的目标小区， 将其添加在候选目标小区列 表中。
步骤 180, 终端选择合适的最终目标小区发送切换指示（ HO-IND )进行 切换； 步骤 190, 宏小区基站判断最终目标小区为微微小区， 若其 E-MBS处于 关闭状态， 则该宏小区基站指示该微微小区基站激活 EMBS。 在其他实施例中， 如果宏小区基站未在目标小区列表中携带候选目标小 区的 E-MBS能力状态， 则如果终端选择的目标微微小区不支持 EMBS, 终 端的 EMBS将终止。
实施例 2 当微微小区基站不支持多播广播业务， 该微微小区基站处于一个宏小区 基站的覆盖区域内， 且该宏小区基站和微微小区基站同属于一个多小区同步 发送多播广播业务区域中时， 当以微微小区基站为服务基站的所有终端没有 接收多播广播业务的需求时， 微微小区基站可以在网络侧分配的多播广播业 务的时频资源上发送单播业务的信令和 /或数据， 但发送功率受限， 微微小区 基站可以根据测量宏小区基站发送 E-MBS 业务的资源上的干扰来决定在该 资源上发送单播业务所釆用的调制编码方式， 以便减小微微小区基站对宏小 区基站终端接收 E-MBS数据的干扰以及宏小区基站 E-MBS数据对微微小区 基站下的终端的单播数据的干扰。 图 3给出了微微小区基站在宏小区发送多播广播业务的资源上以较低功 率发送信令和 /或数据信息的帧示意图。 图 4给出了微微小区基站对多播广播 业务资源的处理流程示意图， 包括以下步骤： 步骤 210, 微微小区基站可以通过监听与之重叠覆盖的宏小区基站的广 播消息， 获取多播广播业务的资源位置信息， 或者， 当微微小区基站也属于 一个多小区同步发送多播广播业务区域中的一个基站时， 可通过网络侧获取 多播广播业务的资源位置信息； 步骤 220 , 微微小区基站在这些子载波资源上降低发射功率， 即选择较 可靠的调制编码速率以较低的数据速率在这些资源上为其用户发送单播业务 的信令和 /或数据。 当宏小区中有终端准备切换至微微小区时， 且该终端需要保持接收多播 广播业务， 根据微微小区基站是否支持多播广播业务， 执行不同的处理， 参 见实施例 1。
实施例 3 微微小区基站处于一个宏小区基站的覆盖区域内， 且该宏小区基站和微 微小区基站同属于一个多小区同步发送多播广播业务区域中， 当多播广播业 务被网络侧同步调度在某些无线子帧的全部或部分子载波资源上时， 微微小 区基站与宏小区基站可以以宏分集或非宏分集的发送方式提供多播广播业 务。 微微小区基站通过网络侧获取多播广播业务的资源位置， 控制信息和 / 或数据信息。宏分集发送方式下，微微小区与宏小区同步发送多播广播业务， 即微微小区在与宏小区发送多播广播业务的无线帧中的相同子帧上发送相同 多播广播业务。 非宏分集发送方式下， 微微小区在与宏小区发送多播广播业 务的无线帧内不同的子帧上发送相同的多播广播业务内容。 图 5给出了微微 小区基站在宏小区发送多播广播业务的无线帧中的不同子帧上发送相同多播 广播业务的帧示意图。 宏分集的多小区同步发送多播广播业务， 即宏分集发送方式， 是通过多 个宏小区以同步的方式在相同的时频资源发送相同的多播广播业务数据， 从 而获得宏分集增益， 以提高覆盖，增大小区边缘用户的多播广播业务吞吐量， 同时由于多小区在此资源上发送的数据相同， 因此不存在干扰， 从而能以更 高的功率进行发射， 进一步提高系统容量。 不支持宏分集的多小区发送多播广播业务， 即非宏分集发送方式， 是通 过多个宏小区以在一个无线帧内同步的方式发送相同的多播广播业务数据， 各个宏小区不需要严格的符号同步， 且各个宏小区可以在同一个无线帧内的 不同子帧上发送相同的多播广播业务内容， 终端可以通过接收多个具有相同 内容的多播广播业务数据包， 从而获得选择性合并增益， 以提高小区边缘用 户的多播广播业务接收可靠性。 图 6a和图 6b分别给出了支持宏分集的多小区多播广播业务的子帧配置 方式， 和不支持宏分集的多小区多播广播业务的子帧配置方式。 如图所示， 对于支持宏分集的多小区多播广播业务发送方式， 各个宏小区基站配置相同 的多播广播子帧， 而对于不支持宏分集的多小区多播广播业务发送方式， 各 个宏小区基站在相同的无线帧内， 但可以配置不同的多播广播子帧。 非宏分集发送方式下， 以微微小区为服务小区的用户可以获得本小区的 多播广播业务服务， 同时通过接收宏小区在其它子帧上发送的相同的多播广 播业务内容， 进行选择性的合并。 同时以宏小区为服务小区的用户可以获得 本小区的多播广播业务服务， 同时通过接收附近微微小区在其它子帧上发送 的相同的多播广播业务内容， 进行选择性的合并。 从而提高多播广播业务的 服务质量。 当微微小区进入低能耗工作模式（ low-duty mode ) 时， 多播广播业务仍 然继续发送。 多播广播业务的资源分配周期等参数不影响低能耗工作模式下
据多播广播业 的资源分配周期进行调整 …少
实施例 4 假设微微小区基站和宏小区基站使用不同的载频， 或者微微小区基站正 在服务的终端仅有少数接收多播广播业务， 微微小区基站可以以单小区发送 的方式为其服务用户提供多播广播业务。 微微小区基站通过网络侧获取多播 广播业务的数据信息，由微微小区基站动态调度发送这些多播广播业务数据。 图 7给出了微微小区基站在与宏小区发送多播广播业务的时频资源不同的位 置上动态调度单小区多播广播业务的帧示意图。 单小区发送多播广播业务是通过基站灵活动态调度资源来发送多播广播 业务， 没有多小区宏分集和选择性合并增益， 但基站无需和其它基站协调调 度资源， 因此可以灵活调度资源， 多适用于某些无法与其它基站很好同步的 场景以及异频点工作的场景下。
如上所述,借助于本发明提供的在微微小区中多播广播业务的发送方法， 终端可以可靠地高效地接收多播广播业务。 解决了系统中微微小区和宏小区 之间提供多播广播业务的干扰协调问题， 通过本发明， 能够改善系统的多播 广播服务性能。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本 领域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。
工业实用性 通过本发明， 能够有效减少微微小区基站在同步多播广播发送覆盖区域 内的干扰， 即减少微微小区对宏小区多播广播业务的干扰， 同时微微小区基 站根据自己服务的终端是否需要接收 E-MBS 业务来开启和关闭 E-MBS服 务，既可以使微微小区省电， 同时节约了微微小区与网络侧连接的带宽资源， 可更好地为私有用户提供服务， 提高系统的服务质量。

Claims

权 利 要 求 书
1、 一种提供增强的多播广播业务的方法， 包括： 与宏小区基站覆盖区域重叠的基站的增强型多播广播业务（E-MBS ) 关 闭时， 所述基站获取所述宏小区基站用于发送 E-MBS 的时频资源， 在所述 时频资源上不发送信令和 /或数据。
2、 如权利要求 1所述的方法， 其中： 所述 E-MBS在所述宏小区基站是釆用多小区宏分集发送方式发送； 所述时频资源为以多小区宏分集方式发送 E-MBS的时频资源。
3、 如权利要求 1所述的方法， 其中： 所述基站釆用以下方式中的一种或两种获取所述时频资源： 所述基站监听与所述基站重叠覆盖的宏小区基站的广播消息， 获取该宏 小区基站发送 E-MBS的时频资源位置； 所述基站通过网络侧获取所述宏小区基站发送 E-MBS的时频资源位置。
4、 如权利要求 1所述的方法， 其中， 获取时频资源的步骤之后， 所述方 法还包括： 所述基站将自己不发送信令和 /或数据的子帧位置告知给终端，所述终端 在这些子帧位置上不接收信令和 /或数据。
5、 如权利要求 1所述的方法， 其中， 所述方法还包括： 当所述基站支持 E-MBS, 且当前小区内的终端没有请求接收 E-MBS或 当前小区内的所有终端均已结束接收 E-MBS时， 所述基站关闭 E-MBS。
6、 如权利要求 1所述的方法， 其中， 获取时频资源的步骤之后， 所述方 法还包括： 当所述宏小区内的终端发起切换请求， 且所述终端在切换请求中指示需 要保持接收多播广播业务时， 所述宏小区基站与所述基站协商该基站的
E-MBS能力状态； 协商完毕后， 所述宏小区基站向终端响应切换命令， 所述切换命令携带 所有候选目标小区的 E-MBS能力状态； 以及 所述终端至少根据候选目标小区的 E-MBS 能力状态从候选目标小区中 选择一目标小区， 向所述宏小区基站发送切换指示。
7、 如权利要求 6所述的方法， 其中： 所述 E-MBS能力状态包括：支持 E-MBS且 E-MBS已激活 ,支持 E-MBS 且 E-MBS业务关闭， 以及不支持 E-MBS中的一种。
8、如权利要求 7所述的方法， 其中， 向所述宏小区基站发送切换指示的 步骤之后， 所述方法还包括： 所述宏小区基站判断所述终端选择的目标小区所属基站的 E-MBS 能力 状态， 若为支持 E-MBS且 E-MBS关闭， 则指示所述目标小区所属基站激活 E-MBS。
9、 如权利要求 1所述的方法， 其中， 所述方法还包括： 所述终端从空闲模式进入激活模式， 选择所述基站管辖小区进行网络重 接入，所述基站通过网络侧获知终端将要接收 E-MBS,若所述基站的 E-MBS 能力状态为关闭 E-MBS , 则所述基站激活 E-MBS。
10、 如权利要求 1-9中任一权利要求所述的方法， 其中： 所述基站为微微小区基站或第二宏小区基站。
11、 一种提供增强的多播广播业务的方法， 包括： 与宏小区基站覆盖区域重叠的基站获取所述宏小区基站用于发送增强型 多播广播业务（E-MBS ) 的时频资源； 所述基站在所述时频资源上根据干扰测量结果选择调制编码方式； 以及 所述基站釆用选择的调制编码方式发送单播业务的信令和 /或数据。
12、 如权利要求 11所述的方法， 其中： 所述 E-MBS在所述宏小区基站是釆用多小区宏分集发送方式发送； 所述时频资源为以多小区宏分集方式发送 E-MBS的时频资源。
13、 如权利要求 11所述的方法， 其中： 所述基站釆用以下方式中的一种或两种获取所述时频资源： 所述基站监听与之重叠覆盖的宏小区基站的广播消息， 获取该宏小区基 站发送 E-MBS的时频资源位置； 所述基站通过网络侧获取发送 E-MBS的时频资源位置。
14、 如权利要求 11所述的方法， 其中， 获取时频资源的步骤之后， 所述 方法还包括： 当所述宏小区内的终端发起切换请求， 且所述终端在切换请求中指示需 要保持接收多播广播业务时， 所述宏小区基站与所述基站协商该基站的 E-MBS能力状态； 协商完毕后， 所述宏小区基站向终端响应切换命令， 所述切换命令携带 所有候选目标小区的 E-MBS能力状态； 以及 所述终端至少根据候选目标小区的 E-MBS 能力状态从候选目标小区中 选择一目标小区， 向所述宏小区基站发送切换指示。
15、 如权利要求 14所述的方法， 其中： 所述 E-MBS能力状态包括：支持 E-MBS且 E-MBS已激活，支持 E-MBS 且 E-MBS关闭， 以及不支持 E-MBS中的一种。
16、如权利要求 15所述的方法， 其中， 向所述宏小区基站发送切换指示 的步骤之后， 所述方法还包括： 所述宏小区基站判断所述终端选择的目标小区所属基站的 E-MBS 能力 状态， 若为支持 E-MBS且 E-MBS关闭， 则指示所述目标小区所属基站激活
E-MBS。
17、 如权利要求 11所述的方法， 其中， 所述方法还包括： 所述终端从空闲模式进入激活模式， 选择所述基站管辖小区进行网络重 接入，所述基站通过网络侧获知终端将要接收 E-MBS,若所述基站的 E-MBS 能力状态为关闭 E-MBS, 则所述基站激活 E-MBS。
18、 如权利要求 11-16中任一权利要求所述的方法， 其中： 所述基站为微微小区基站或第二宏小区基站。
19、 一种提供增强的多播广播业务的基站， 包括判断模块、 资源获取模 块和发送模块， 其中： 所述判断模块设置为： 在判定本基站的增强型多播广播业务（E-MBS ) 为关闭状态时， 进一步判断本基站的覆盖区域与宏小区基站覆盖区域是否重 叠， 如果是， 则调用所述资源获取模块； 所述资源获取模块设置为： 获取所述宏小区基站用于发送 E-MBS 的时 频资源， 将得到的时频资源发送给发送模块； 所述发送模块设置为： 在所述时频资源上停止发送信令和 /或数据。
20、 一种提供增强的多播广播业务的基站， 包括判断模块、 资源获取模 块和发送模块， 其中： 所述判断模块设置为： 在判定本基站的覆盖区域与宏小区基站的覆盖区 域重叠时， 调用所述资源获取模块； 所述资源获取模块设置为： 获取所述宏小区基站用于发送增强型多播广 播业务（E-MBS ) 的时频资源， 将得到的时频资源发送给发送模块； 所述发送模块设置为： 在所述时频资源上根据干扰测量结果选择调制编 码方式， 釆用选择的调制编码方式发送单播业务的信令和 /或数据。
PCT/CN2010/073829 2009-08-31 2010-06-11 一种提供增强的多播广播业务的方法和基站 WO2011023019A1 (zh)

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